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Question: In 2017, the Restaurant Hospitality website


In 2017, the Restaurant Hospitality website reported that only 10% of surplus food is being recovered in the food-service and restaurant sector, leaving approximately 1.5 billion meals per year uneaten. Assume this is the true population proportion and that you plan to take a sample survey of 525 companies in the in the food-service and restaurant sector to further investigate their behavior.
a. Show the sampling distribution of , the proportion of food recovered by your sample respondents.
b. What is the probability that your survey will provide a sample proportion within ±.03 of the population proportion?
c. What is the probability that your survey will provide a sample proportion within ±.015 of the population proportion?


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> The following crosstabulation summarizes the data for two categorical variables, x and y. The variable x can take on values low, medium, or high and the variable y can take on values yes or no. a. Compute the row percentages. b. Construct a stacked per

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> Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the mean and median.

> Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the variance and standard deviation.

> Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the range and interquartile range.

> A survey conducted by Better Homes and Gardens Real Estate LLC showed that one in five U.S. homeowners has either moved from their home or would like to move because their neighborhood or community isn’t ideal for their lifestyle (Better Homes and Garden

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> Construct a histogram for the data in exercise 12. Data from exercise 12:

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> A random telephone survey of 1021 adults (aged 18 and older) was conducted by Opinion Research Corporation on behalf of CompleteTax, an online tax preparation and e-filing service. The survey results showed that 684 of those surveyed planned to file thei

> A manager of a large corporation recommends a $10,000 raise be given to keep a valued subordinate from moving to another company. What internal and external sources of data might be used to decide whether such a salary increase is appropriate?

> Skechers U.S.A., Inc., is a performance footwear company headquartered in Manhattan Beach, California. The sales revenue for Skechers over a four-year period are as follows: Are these cross-sectional or time-series data? b. Construct a bar graph similar

> Jewelry Sales. The U.S. Census Bureau tracks sales per month for various products and services through its Monthly Retail Trade Survey. Figure 1.9 shows monthly jewelry sales in millions of dollars for 2016. a. Are the data quantitative or categorical?

> Consider the following data. a. Construct a dot plot. b. Construct a frequency distribution. c. Construct a percent frequency distribution.

> Figure 1.8 provides a bar chart showing the annual advertising revenue for Facebook from 2010 to 2017 (Facebook Annual Reports). a. What is the variable of interest? b. Are the data categorical or quantitative? c. Are the data time series or cross-sect

> A seven-year medical research study reported that women whose mothers took the drug diethylstilbestrol (DES) during pregnancy were twice as likely to develop tissue abnormalities that might lead to cancer as were women whose mothers did not take the drug

> Consider the following frequency distribution. Construct a cumulative frequency distribution and a cumulative relative frequency distribution.

> A Gallup Poll utilizing a random sample of 1,503 adults ages 18 or older was conducted in April 2018. The survey indicated a majority of Americans (53%) say driverless cars will be common in the next 10 years (Gallup, https://news.gallup.com/poll/234152/

> The response to a question has three alternatives: A, B, and C. A sample of 120 responses provides 60 A, 24 B, and 36 C. Show the frequency and relative frequency distributions.

> Based on data from the U.S. Census Bureau, a Pew Research study showed that the percentage of employed individuals ages 25–29 who are college educated is at an all-time high. The study showed that the percentage of employed individuals aged 25–29 with at

> The Tennessean, an online newspaper located in Nashville, Tennessee, conducts a daily poll to obtain reader opinions on a variety of current issues. In a recent poll, 762 readers responded to the following question: “If a constitutional amendment to ban

> Assume that we want to identify a simple random sample of 12 of the 372 doctors practicing in a particular city. The doctors’ names are available from a local medical organization. Use the eighth column of five-digit random numbers in T

> According to the U.S. Department of Health and Human Services, only 49.2% of homes in the United States used landline telephone service in 2017. a. Suppose a sample of 207,000 U.S. homes will be taken to learn about home telephone usage. Show the samplin

> The president of Colossus.com, Inc., believes that 42% of the firm’s orders come from customers who have purchased from Colossus.com in the past. A random sample of 108,700 orders from the past six months will be used to estimate the proportion of orders

> The New York Times reported that 17.2 million new cars and light trucks were sold in the United States in 2017, and the U.S. Environmental Protection Agency projects the average efficiency for these vehicles to be 25.2 miles per gallon. Assume that that

> The U.S. Bureau of Labor Statistics (BLS) reported that the mean annual number of hours of vacation time earned by blue-collar and service employees who work for small private establishments and have at least 10 years of service is 100. Assume that for t

> A survey of 131 investment managers in Barron’s Big Money poll revealed the following: ●● 43% of managers classified themselves as bullish or very bullish on the stock market. ●● The average expected return over the next 12 months for equities was 11.2%.

> Tablet PC Comparison provides a wide variety of information about tablet computers. The company’s website enables consumers to easily compare different tablets using factors such as cost, type of operating system, display size, battery

> A sample of size 100,000 is selected from a population with p 5 .75. a. What is the expected value of /? b. What is the standard error of /? c. Show the sampling distribution of /. d. What does the sampling distribution of / show?

> Assume the population standard deviation is σ=25. Compute the standard error of the mean, , for sample sizes of 500,000; 1,000,000; 5,000,000; 10,000,000; and 100,000,000. What can you say about the size of the standard error of the mean as the sample s

> A population has a mean of 400 and a standard deviation of 100. A sample of size 100,000 will be taken, and the sample mean / will be used to estimate the population mean. a. What is the expected value of /? b. What is the standard deviation of /? c. Sho

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> Most computer languages include a function that can be used to generate random numbers. In Excel, the RAND function can be used to generate random numbers between 0 and 1. If we let x denote a random number generated using RAND, then x is a continuous ra

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> Consider the following exponential probability density function. a. Find P(x ≤ 6). b. Find P(x ≤ 4). c. Find P(x ≥ 6). d. Find P(4 ≤ x ≤ 6).

> Rocky Mountain National Park is a popular park for outdoor recreation activities in Colorado. According to U.S. National Park Service statistics, 46.7% of visitors to Rocky Mountain National Park in 2018 entered through the Beaver Meadows park entrance,

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> OutdoorGearLab is an organization that tests outdoor gear used for climbing, camping, mountaineering, and backpacking. Suppose that the following data show the ratings of hardshell jackets based on the breathability, durability, versatility, features, mo

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> Given that z is a standard normal random variable, find z for each situation. a. The area to the right of z is .01. b. The area to the right of z is .025. c. The area to the right of z is .05. d. The area to the right of z is .10.

> Given that z is a standard normal random variable, find z for each situation. a. The area to the left of z is .2119. b. The area between −z and z is .9030. c. The area between −z and z is .2052. d. The area to the left of z is .9948. e. The area to the r

> Given that z is a standard normal random variable, find z for each situation. a. The area to the left of z is .9750. b. The area between 0 and z is .4750. c. The area to the left of z is .7291. d. The area to the right of z is .1314. e. The area to the l

> Given that z is a standard normal random variable, compute the following probabilities. a. P(−1.98 ≤ z ≤ .49) b. P(.52 ≤ z ≤ 1.22) c. P(−1.75 ≤ z ≤ −1.04)

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