Question: The chair of the board of directors

> The Medical Assurance Company is investigating the cost of a routine office visit to family-practice physicians in the Rochester, New York, area. The following is a list of 39 family-practice physicians in the region. Physicians are to be randomly select

> Answer the following questions in one or two well-constructed sentences. a. What happens to the standard error of the mean if the sample size is increased? b. What happens to the distribution of the sample means if the sample size is increased? c. When u

> Listed below are the salaries for the 2016 New York Yankees Major League Baseball team. a. Determine the mean, median, and the standard deviation. b. Determine the coefficient of skewness using Pearson’s method. c. Determine the coeff

> The frequency distribution of order lead time of the retailer from Exercise 18 is repeated below. Lead Time (days) __________Frequency 0 up to 5 …………….………………………………. 6 5 up to 10 …………………………………………... 7 10 up to 15 ………………………………………… 12 15 up to 20 ………………………

> The probability a D-Link network server is down is .05. If you have three independent servers, what is the probability that at least one of them is operational?

> Two components, A and B, operate in series. Being in series means that for the system to operate, both components A and B must work. Assume the two components are independent. What is the probability the system works under these conditions? The probabili

> What is the critical F value when the sample size for the numerator is four and the sample size for the denominator is seven? Use a one-tailed test and the .01 significance level.

> You need to estimate the mean number of travel days per year for salespeople. The mean of a small pilot study was 150 days, with a standard deviation of 14 days. If you must estimate the population mean within 2 days, how many salespeople should you samp

> A recent study by the American Automobile Dealers Association surveyed a random sample of 20 dealers. The data revealed a mean amount of profit per car sold was $290, with a standard deviation of $125. Develop a 95% confidence interval for the population

> The American Restaurant Association collected information on the number of meals eaten outside the home per week by young married couples. A survey of 60 couples showed the sample mean number of meals eaten outside the home was 2.76 meals per week, with

> Refer to the North Valley Real Estate data, which report information on homes sold in the area last year. Consider the following variables: selling price, number of bedrooms, township, and mortgage type. a. Which of the variables are qualitative and whic

> The following graph portrays the distribution of the number of spicy chicken sandwiches sold at a nearby Wendy’s for the last 141 days. The mean number of sandwiches sold per day is 91.9 and the standard deviation is 4.67. If we use t

> Use Appendix B.5 to locate the value of t under the following conditions. a. The sample size is 15 and the level of confidence is 95%. b. The sample size is 24 and the level of confidence is 98%. c. The sample size is 12 and the level of confidence is 90

> Refer to the following picture. a. What is the picture called? b. What rule of probability is illustrated? c. B represents the event of choosing a family that receives welfare payments. What does P(B) + P(∼B) equal? B -B

> Listed next are the 27 Nationwide Insurance agents in the El Paso, Texas metropolitan area. The agents are numbered 00 through 26. We would like to estimate the mean number of years employed with Nationwide. a. We want to select a random sample of four

> The first card selected from a standard 52-card deck is a king. a. If it is returned to the deck, what is the probability that a king will be drawn on the second selection? b. If the king is not replaced, what is the probability that a king will be drawn

> List the major characteristics of a normal probability distribution.

> The manufacturer of a laser printer reports the mean number of pages a cartridge will print before it needs replacing is 12,200. The distribution of pages printed per cartridge closely follows the normal probability distribution and the standard deviatio

> For the most recent year available, the mean annual cost to attend a private university in the United States was $42,224. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,500. Ninety-fiv

> The number of times a particular event occurred in the past is divided by the number of occurrences. What is this approach to probability called?

> Mary Jo Fitzpatrick is the vice president for Nursing Services at St. Luke’s Memorial Hospital. Recently she noticed in the job postings for nurses that those that are unionized seem to offer higher wages. She decided to investigate and

> The SAT Reasoning Test is perhaps the most widely used standardized test for college admissions in the United States. Scores are based on a normal distribution with a mean of 1500 and a standard deviation of 300. Clinton College would like to offer an ho

> A company is creating three new divisions and seven managers are eligible to be appointed head of a division. How many different ways could the three new heads be appointed?

> A telephone number consists of seven digits, the first three representing the exchange. How many different telephone numbers are possible within the 537 exchange?

> A representative of the Environmental Protection Agency (EPA) wants to select samples from 10 landfills. The director has 15 landfills from which she can collect samples. How many different samples are possible?

> Solve the following: a. 20!/17! b. 9P3 c. 7C2

> Wendy’s offers eight different condiments (mustard, catsup, onion, mayonnaise, pickle, lettuce, tomato, and relish) on hamburgers. A store manager collected the following information on the number of condiments ordered and the age group

> The manager of Information Services at Wilkin Investigations, a private investigation firm, is studying the relationship between the age (in months) of a combination printer, copier, and fax machine and its monthly maintenance cost. For a sample of 15 ma

> The personnel files of all eight employees at the Pawnee location of Acme Carpet Cleaners Inc. revealed that during the last 6-month period they lost the following number of days due to illness: All eight employees during the same period at the Chickpe

> A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80% of the values will occur.

> Among the thirty largest U.S. cities, the mean one-way commute time to work is 25.8 minutes. https://deepblue.lib.umich.edu/bitstream/handle/2027.42/112057/103196.pdf?sequence=1&isAllowed=y. The longest one-way travel time is in New York City, where the

> A normal population has a mean of 80.0 and a standard deviation of 14.0. a. Compute the probability of a value between 75.0 and 90.0. b. Compute the probability of a value of 75.0 or less. c. Compute the probability of a value between 55.0 and 70.0.

> The mean of a normal probability distribution is 400 pounds. The standard deviation is 10 pounds. a. What is the area between 415 pounds and the mean of 400 pounds? b. What is the area between the mean and 395 pounds? c. What is the probability of select

> The following chart summarizes the selling price of homes sold last month in the Sarasota, Florida, area. a. What is the chart called? b. How many homes were sold during the last month? c. What is the class interval? d. About 75% of the houses sold for

> The mean of a normal probability distribution is 60; the standard deviation is 5. a. About what percent of the observations lie between 55 and 65? b. About what percent of the observations lie between 50 and 70? c. About what percent of the observations

> The following box plot shows the number of daily newspapers published in each state and the District of Columbia. Write a brief report summarizing the number published. Be sure to include information on the values of the first and third quartiles, the me

> A large company must hire a new president. The Board of Directors prepares a list of five candidates, all of whom are equally qualified. Two of these candidates are members of a minority group. To avoid bias in the selection of the candidate, the company

> JetBlue Airways is an American low-cost airline headquartered in New York City. Its main base is John F. Kennedy International Airport. JetBlue’s revenue in 2002 was $635.2 million. By 2014, revenue had increased to $5,817.0 million. What was the geometr

> All Seasons Plumbing has two service trucks that frequently need repair. If the probability the first truck is available is .75, the probability the second truck is available is .50, and the probability that both trucks are available is .30, what is the

> In 2001, a total of 40,244,000 taxpayers in the United States filed their individual tax returns electronically. By the year 2015, the number increased to 128,653,000. What is the geometric mean annual increase for the period?

> Suppose P(X1) = .75 and P(Y2 | X1) = .40. What is the joint probability of X1 and Y2?

> A National Park Service survey of visitors to the Rocky Mountain region revealed that 50% visit Yellowstone Park, 40% visit the Tetons, and 35% visit both. a. What is the probability a vacationer will visit at least one of these attractions? b. What is t

> The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 16 people reveals the mean yearly consumption to be 45 gallons with a standard deviation of 20 gallons. Assume the population distribution is normal. a. What is the v

> Two coins are tossed. If A is the event “two heads” and B is the event “two tails,” are A and B mutually exclusive? Are they complements?

> Silver Springs Moving and Storage Inc. is studying the relationship between the number of rooms in a move and the number of labor hours required for the move. As part of the analysis, the CFO of Silver Springs developed the following scatter diagram. a

> The Bookstall Inc. is a specialty bookstore concentrating on used books sold via the Internet. Paperbacks are $1.00 each, and hardcover books are $3.50. Of the 50 books sold last Tuesday morning, 40 were paperback and the rest were hardcover. What was th

> Describe the similarities and differences between a frequency table and a frequency distribution. Be sure to include which requires qualitative data and which requires quantitative data.

> Big Orange Trucking is designing an information system for use in “in-cab” communications. It must summarize data from eight sites throughout a region to describe typical conditions. Compute an appropriate measure of c

> Refer to the Lincolnville School District bus data, which report information on the school district’s bus fleet. a. Which of the variables are qualitative and which are quantitative? b. Determine the level of measurement for each variable.

> The events X and Y are mutually exclusive. Suppose P(X) = .05 and P(Y) = .02. What is the probability of either X or Y occurring? What is the probability that neither X nor Y will happen?

> An investor buys 100 shares of AT&T stock and records its price change daily. a. List several possible events for this experiment. b. Which concept of probability did you use in (a)?

> The following chart depicts the average amounts spent by consumers on holiday gifts. Write a brief report summarizing the amounts spent during the holidays. Be sure to include the total amount spent and the percent spent by each group. A B D E F G

> The following are the ages of the 10 people in the Java Coffee Shop at the Southwyck Shopping Mall at 10 a.m. Determine the (a) Mean, (b) Median, and (c) Mode. 41 20 23 24 33 37 42 23 29 21

> The following chart shows the number of patients admitted daily to Memorial Hospital through the emergency room. a. What is the midpoint of the 2 up to 4 class? b. How many days were 2 up to 4 patients admitted? c. What is the class interval? d. What i

> AVX Home Entertainment, Inc., recently began a “no-hassles” return policy. A sample of 500 customers who recently returned items showed 400 thought the policy was fair, 32 thought it took too long to complete the transaction, and the rest had no opinion.

> The third row of a stem-and-leaf chart appears as follows: 21 | 0 1 3 5 7 9. Assume whole number values. a. What is the “possible range” of the values in this row? b. How many data values are in this row? c. List the actual values in this row of data.

> The following chart reports the number of cell phones sold at a big-box retail store for the last 26 days. a. What are the maximum and the minimum numbers of cell phones sold in a day? b. What is a typical number of cell phones sold? 4 9. 14 19

> A large pharmaceutical company hires business administration graduates to sell its products. The company is growing rapidly and dedicates only 1 day of sales training for new salespeople. The company’s goal for new salespeople is $10,000 per month. The g

> Using the concepts of sample and population, describe how a presidential election is unlike an “exit” poll of the electorate.

> A Human Resources manager at Metal Technologies studied the overtime hours of welders. A sample of 15 welders showed the following number of overtime hours worked last month. (a) Compute the arithmetic mean and (b) Indicate whether it is a statistic or

> A poll solicits a large number of college undergraduates for information on the following variables: the name of their cell phone provider (AT&T, Verizon, and so on), the numbers of minutes used last month (200, 400, for example), and their satisfaction

> Describe the differences between a histogram and a stem-and-leaf display.

> The following stem-and-leaf chart reports the number of prescriptions filled per day at the pharmacy on the corner of Fourth and Main Streets. Stem ___________________Leaf 12 ………………………………………………. 689 13 ………………………………………………. 123 14 …………………………………….………. 6889

> The following is the number of oil changes for the last 7 days at the Jiffy Lube located at the corner of Elm Street and Pennsylvania Avenue. Determine the (a) Mean, (b) Median, and (c) Mode. 41 15 39 54 31 15 33

> Suppose you go to the grocery store and spend $61.85 for the purchase of 14 items. What is the mean price per item?

> Explain the difference between a sample and a population.

> Compute the mean of the following population values: 7, 5, 7, 3, 7, 4.

> For each of the following, determine whether the group is a sample or a population. a. The participants in a study of a new cholesterol drug. b. The drivers who received a speeding ticket in Kansas City last month. c. People on welfare in Cook County (Ch

> Slate is a daily magazine on the Web. Its business activities can be described by a number of variables. What is the level of measurement for each of the following variables? a. The number of hits on their website on Saturday between 8:00 am and 9:00 am.

> Refer to the Lincolnville School bus data. Develop a regression equation that expresses the relationship between age of the bus and maintenance cost. The age of the bus is the independent variable. a. Draw a scatter diagram. What does this diagram sugges

> The North Valley Real Estate data reports information on homes on the market. a. Let selling price be the dependent variable and size of the home the independent variable. Determine the regression equation. Estimate the selling price for a home with an a

> Waterbury Insurance Company wants to study the relationship between the amount of fire damage and the distance between the burning house and the nearest fire station. This information will be used in setting rates for insurance coverage. For a sample of

> A consumer buying cooperative tested the effective heating area of 20 different electric space heaters with different wattages. Here are the results. a. Compute the correlation between the wattage and heating area. Is there a direct or an indirect rela

> The following table shows the mean annual percent return on capital (profitability) and the mean annual percentage sales growth for eight aerospace and defense companies. a. Compute the correlation coefficient. Conduct a test of hypothesis to determine

> The food services division of Cedar River Amusement Park Inc. is studying the amount of money spent per day on food and drink by families who visit the amusement park. A sample of 40 families who visited the park yesterday revealed they spent the followi

> A highway employee performed a regression analysis of the relationship between the number of construction work-zone fatalities and the number of unemployed people in a state. The regression equation is Fatalities = 12.7 + 0.000114 (Unemp). Some additiona

> Super Markets Inc. is considering expanding into the Scottsdale, Arizona, area. You, as director of planning, must present an analysis of the proposed expansion to the operating committee of the board of directors. As a part of your proposal, you need to

> Mr. William Profit is studying companies going public for the first time. He is particularly interested in the relationship between the size of the offering and the price per share. A sample of 15 companies that recently went public revealed the followin

> Emily Smith decides to buy a fuel-efficient used car. Here are several vehicles she is considering, with the estimated cost to purchase and the age of the vehicle. a. Plot these data on a scatter diagram with estimated cost as the dependent variable. b

> The Cotton Mill is an upscale chain of women’s clothing stores, located primarily in the southwest United States. Due to recent success, The Cotton Mill’s top management is planning to expand by locating new stores in

> A suburban hotel derives its revenue from its hotel and restaurant operations. The owners are interested in the relationship between the number of rooms occupied on a nightly basis and the revenue per day in the restaurant. Below is a sample of 25 days (

> Every April, The Masters—one of the most prestigious golf tournaments on the PGA golf tour—is played in Augusta, Georgia. In 2016, 55 players received prize money. The 2016 winner, Danny Willett, earned a prize of $1,8

> We are studying mutual bond funds for the purpose of investing in several funds. For this particular study, we want to focus on the assets of a fund and its five-year performance. The question is: Can the five-year rate of return be estimated based on th

> Mr. James McWhinney, president of Daniel-James Financial Services, believes there is a relationship between the number of client contacts and the dollar amount of sales. To document this assertion, Mr. McWhinney gathered the following sample information.

> The following sample of observations was randomly selected. a. Determine the regression equation. b. Determine the value of Å· when x is 7. X: 3 6 4 4 6 8 y. 13 15 7 12 13 11 9 0O 5 3.

> Scrapper Elevator Company has 20 sales representatives who sell its product throughout the United States and Canada. The number of units sold last month by each representative is listed below. Assume these sales figures to be the population values. a.

> The Student Government Association at Middle Carolina University wanted to demonstrate the relationship between the number of beers a student drinks and his or her blood alcohol content (BAC). A random sample of 18 students participated in a study in whi

> The owner of Maumee Ford-Volvo wants to study the relationship between the age of a car and its selling price. Listed below is a random sample of 12 used cars sold at the dealership during the last year. a. Draw a scatter diagram. b. Determine the corr

> The production department of Celltronics International wants to explore the relationship between the number of employees who assemble a subassembly and the number produced. As an experiment, two employees were assigned to assemble the subassemblies. They

> Refer to the Baseball 2016 data, which report information on the 30 Major League Baseball teams for the 2016 season. a. At the .10 significance level, is there a difference in the variation in team salary among the American and National League teams? b.

> Robert Altoff is vice president of engineering for a manufacturer of household washing machines. As part of a new product development project, he wishes to determine the optimal length of time for the washing cycle. Included in the project is a study of

> There are four radio stations in Midland. The stations have different formats (hard rock, classical, country/western, and easy listening), but each is concerned with the number of minutes of music played per hour. From a sample of 10 randomly selected ho

> Each of three supermarket chains in the Denver area claims to have the lowest overall prices. As part of an investigative study on supermarket advertising, a local television station conducted a study by randomly selecting nine grocery items. Then, on th

> A task requires the completion of four activities. A teacher would like to know if differences in the sequence of the four activities results in different task completion times. The teacher selects three students and demonstrates the activities in random

> There are four McBurger restaurants in the Columbus, Georgia, area. The numbers of burgers sold at the respective restaurants for each of the last 6 weeks are shown below. At the .05 significance level, is there a difference in the mean number sold among

> To prevent spam from entering your email inbox, you use a filter. You are interested in knowing if the number of spam emails differs by day of the week. The number of spam emails by day of week is counted and recorded. Minitab is used to perform the data

> The Quick Change Oil Company has a number of outlets in the metropolitan Seattle area. The daily number of oil changes at the Oak Street outlet in the past 20 days are: The data are to be organized into a frequency distribution. a. How many classes wou

> Three assembly lines are used to produce a certain component for an airliner. To examine the production rate, a random sample of six hourly periods is chosen for each assembly line and the number of components produced during these periods for each line

> A study of the effect of television commercials on 12-year-old children measured their attention span, in seconds. The commercials were for clothes, food, and toys. At the .05 significance level, is there a difference in the mean attention span of the ch

> Jacob Lee is a frequent traveler between Los Angeles and San Diego. For the past month, he wrote down the flight times in minutes on three different airlines. The results are: a. Use the .05 significance level and the six-step hypothesis-testing proces