Identify the population and the sample. Describe the sample data set. A survey of 1254 preowned automobile shoppers found that 5% bought extended warranties.
> Identify the sample space of the probability experiment and determine the number of outcomes in the sample space. Draw a tree diagram when appropriate. Guessing a student’s letter grade (A, B, C, D, F) in a class
> Identify the sample space of the probability experiment and determine the number of outcomes in the sample space. Draw a tree diagram when appropriate. Guessing the initial of a student’s middle name
> The probability that an event will not happen is given. Find the probability that the event will happen. P(E′) = 21/61
> The probability that an event will not happen is given. Find the probability that the event will happen. P(E′) = 3/4
> The probability that an event will not happen is given. Find the probability that the event will happen. P(E′) = 0.13
> What is the difference between a frequency polygon and an ogive?
> The probability that an event will not happen is given. Find the probability that the event will happen. P(E′) = 0.95
> The probability that an event will happen is given. Find the probability that the event will not happen. P(E) = 2/7
> Determine whether each number could represent the probability of an event. Explain your reasoning. a. 25/25 b. 333.3% c. 2.3 d. -0.0004 e. 0 f. 320/105
> The probability that an event will happen is given. Find the probability that the event will not happen. P(E) = 0.03
> The probability that an event will happen is given. Find the probability that the event will not happen. P(E) = 0.55
> The probability that an event will happen is given. Find the probability that the event will not happen. P(E) = 19/23
> Match the event with its probability. a. 0.95 b. 0.005 c. 0.25 d. 0 e. 0.375 f. 0.5 You toss a coin four times. What is the probability of tossing tails exactly half of the time?
> Match the event with its probability. a. 0.95 b. 0.005 c. 0.25 d. 0 e. 0.375 f. 0.5 Five of the 100 digital video recorders (DVRs) in an inventory are known to be defective. What is the probability you randomly select a DVR that is not
> Match the event with its probability. a. 0.95 b. 0.005 c. 0.25 d. 0 e. 0.375 f. 0.5 A game show contestant must randomly select a door. One door doubles her money while the other three doors leave her with no winnings. What is the prob
> Match the event with its probability. a. 0.95 b. 0.005 c. 0.25 d. 0 e. 0.375 f. 0.5 You randomly select a number from 0 to 9 and then randomly select a number from 0 to 19. What is the probability of selecting a 3 both times?
> After constructing an expanded frequency distribution, what should the sum of the relative frequencies be? Explain.
> Match the event with its probability. a. 0.95 b. 0.005 c. 0.25 d. 0 e. 0.375 f. 0.5 A random number generator is used to select a number from 1 to 100. What is the probability of selecting an even number?
> Match the event with its probability. a. 0.95 b. 0.005 c. 0.25 d. 0 e. 0.375 f. 0.5 A random number generator is used to select a number from 1 to 100. What is the probability of selecting the number 153?
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. When an event is almost certain to happen, its complement will be an unusual event.
> What is the difference between an outcome and an event?
> The items below appear on an employment application. Determine the level of measurement of the data for each category. a. Highest grade level completed b. Gender c. Year of college graduation d. Number of years at last job
> The items below appear on a physician’s intake form. Determine the level of measurement of the data for each category. a. Temperature b. Allergies c. Weight d. Pain level (scale of 0 to 10)
> Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure. Motor Vehicle Fatalities by Year 36 35 34 33 32- 2011 2012 2013 2014 2015 Year Number (in thousands)
> Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure. Gender Profile of the 114th Congress 500 400 300 ż 200 100 Women Men Gender Number
> Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure. How Many Vacations Are You Planning to Take This Summer? 50 40 30 20 10- 1-2 34 Sor mote Number of vacations Percent
> Determine the level of measurement of the data listed on the horizontal and vertical axes in the figure. What is the Format of the Books You Read? 40 35 30 25 20 15 10 Response Print only - only Both print and digital Do not read books
> Use the data set and the indicated number of classes to construct a. an expanded frequency distribution, b. a frequency histogram, c. a frequency polygon, d. a relative frequency histogram, and e. an ogive. Pu
> Determine the level of measurement of the data set. Explain your reasoning. The times of the day when a person checks his or her cell phone are listed. 8:28 A.M. 11:25 A.M. 2:26 P.M. 5:28 P.M. 9:30 A.M. 11:46 A.M. 2:49 P.M. 5:57 P.M. 9:43 A.M. 12:27
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. An outlier is any number above Q3 or below Q1.
> Name each level of measurement for which data can be quantitative.
> Determine the level of measurement of the data set. Explain your reasoning. The top ten fiction books on The New York Times Best Sellers List on October 9, 2016, are listed. 1. The Girl on the Train 2. Home 3. The Kept Woman 4. Magic Binds 5. Common
> Determine the level of measurement of the data set. Explain your reasoning. The top ten business schools in the United States for a recent year according to Forbes are listed. 1. Stanford 2. Harvard 3. Northwestern (Kellogg) 4. Columbia 5. Dartmouth
> Determine the level of measurement of the data set. Explain your reasoning. The years that a television show on ABC won the Emmy for best comedy series are listed. 1982 2014 1981 1955 2010 1979 1980 1988 2011 2012 2013
> Determine whether the data are qualitative or quantitative. Explain your reasoning. Wait times at a the Department of Motor Vehicles
> Determine whether the data are qualitative or quantitative. Explain your reasoning. Responses on an opinion poll
> Determine whether the data are qualitative or quantitative. Explain your reasoning. Species of mammals in a rain forest
> Determine whether the data are qualitative or quantitative. Explain your reasoning. Heights of infants in a maternity ward
> Construct a cumulative frequency distribution and an ogive for the data set using six classes. Then describe the location of the greatest increase in frequency. Saturated Fat Intakes Data set: Daily saturated fat intakes (in grams) of 28 people 18 12
> Use the frequency distribution in Exercise 16 to construct an expanded frequency distribution, as shown in Example 2. From Exercise 16: Toledo, OH, Average Normal Temperatures (°F) Class Frequency, S 25-32 86 33-40 39 41-48 41 49-56 48 57-64 43 65-
> Determine whether the data are qualitative or quantitative. Explain your reasoning. Student ID numbers
> Name each level of measurement for which data can be qualitative.
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. The second quartile is the mean of an ordered data set.
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. A population is the collection of some outcomes, responses, measurements, or counts that are of interest.
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. Inferential statistics involves using a population to draw a conclusion about a corresponding sample.
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. It is impossible to obtain all the census data about the U.S. population.
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. A sample is a subset of a population.
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. A statistic is a numerical description of a population characteristic.
> What are the two main branches of statistics?
> Construct a cumulative frequency distribution and an ogive for the data set using six classes. Then describe the location of the greatest increase in frequency. Retirement Ages Data set: Retirement ages of 35 English professors 72 62 55 61 53 62 65 6
> Identify the population and the sample. Describe the sample data set. A survey of 1029 U.S. adults found that 23% of those suffering with chronic pain had been diagnosed with a sleep disorder.
> Identify the population and the sample. Describe the sample data set. A survey of 496 students at a high school found that 95% planned on going to college.
> What is the difference between a parameter and a statistic?
> Determine whether the statement is true or false. If it is false, rewrite it as a true statement. About one-quarter of a data set falls below Q1.
> Identify the population and the sample. Describe the sample data set. A survey of 159 U.S. law firms found that the average hourly billing rate for partners was $604.
> Identify the population and the sample. Describe the sample data set. A survey of 1100 travelers worldwide found that 53% of respondents with pets travel with their pets.
> Identify the population and the sample. Describe the sample data set. A survey of 3301 U.S. adults found that 39% received an influenza vaccine for a recent flu season.
> To find the 10% trimmed mean of a data set, order the data, delete the lowest 10% of the entries and the highest 10% of the entries, and find the mean of the remaining entries. a. Find the 10% trimmed mean for the data in Exercise 65. b. Compare the fo
> Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are shown in the table at the left. a. Find the mean and the median of the data. b. Draw a stem-
> Another measure of central tendency, which is rarely used, is the midrange. It can be found by using the formula Which of the manufacturers in Exercise 63 would prefer to use the midrange statistic in their ads? Explain your reasoning. (Maximum data
> Construct a frequency distribution and a relative frequency histogram for the data set using five classes. Which class has the greatest relative frequency and which has the least relative frequency? Triglyceride Levels Data set: Triglyceride levels (
> A consumer testing service obtained the gas mileages (in miles per gallon) shown in the table at the left in five test runs performed with three types of compact cars. a. The manufacturer of Car A wants to advertise that its car performed best in this t
> a. identify any outliers and b. draw a modified box-and-whisker plot that represents the data set. Use asterisks (*) to identify outliers. 36 38 47 50 53 54 19 27 30 47 48 50 56 60 90 62
> a. identify any outliers and b. draw a modified box-and-whisker plot that represents the data set. Use asterisks (*) to identify outliers. 47 29 59 83 46 1 46 23 52 53 35 37 49
> a. identify any outliers and b. draw a modified box-and-whisker plot that represents the data set. Use asterisks (*) to identify outliers. 75 78 80 75 62 72 74 75 80 95 76 72
> Describe the relationship between quartiles and percentiles.
> a. identify any outliers and b. draw a modified box-and-whisker plot that represents the data set. Use asterisks (*) to identify outliers. 16 9 11 12 8 10 12 13 11 10 24 9 2 15 7 8 10
> The credit card purchases (rounded to the nearest dollar) over the last three months for you and a friend are listed. Use technology to draw side-by-side box-and-whisker plots that represent the data sets. Then describe the shapes of the distributions.
> Side-by-side box-and-whisker plots can be used to compare two or more different data sets. Each box-and-whisker plot is drawn on the same number line to compare the data sets more easily. The lengths (in seconds) of songs played at two different concerts
> Find the midquartile of the data set. 23 36 47 33 34 40 39 24 32 22 38 41
> Find the midquartile of the data set. 5 7 1 2 3 10 8 7 5 3
> What is the difference between relative frequency and cumulative frequency?
> The table shows population statistics for the ages of Best Actor and Best Supporting Actor winners at the Academy Awards from 1929 to 2016. The distributions of the ages are approximately bell-shaped. Compare the z-scores for the actors. Best Actor 1982
> The table shows population statistics for the ages of Best Actor and Best Supporting Actor winners at the Academy Awards from 1929 to 2016. The distributions of the ages are approximately bell-shaped. Compare the z-scores for the actors. Best Actor 1970
> The table shows population statistics for the ages of Best Actor and Best Supporting Actor winners at the Academy Awards from 1929 to 2016. The distributions of the ages are approximately bell-shaped. Compare the z-scores for the actors. Best Actor 2005
> The table shows population statistics for the ages of Best Actor and Best Supporting Actor winners at the Academy Awards from 1929 to 2016. The distributions of the ages are approximately bell-shaped. Compare the z-scores for the actors. Best Actor 1984
> The life spans of a species of fruit fly have a bell-shaped distribution, with a mean of 33 days and a standard deviation of 4 days. a. The life spans of three randomly selected fruit flies are 34 days, 30 days, and 42 days. Find the z-score that corres
> Explain how to identify outliers using the interquartile range.
> A brand of automobile tire has a mean life span of 35,000 miles, with a standard deviation of 2250 miles. Assume the life spans of the tires have a bell-shaped distribution. a. The life spans of three randomly selected tires are 34,000 miles, 37,000 mil
> The distribution of the ages of the winners of the Tour de France from 1903 to 2016 is approximately bell-shaped. The mean age is 27.9Â years, with a standard deviation of 3.3 years. Use the corresponding z-score to determine whether the age i
> The distribution of the ages of the winners of the Tour de France from 1903 to 2016 is approximately bell-shaped. The mean age is 27.9Â years, with a standard deviation of 3.3 years. Use the corresponding z-score to determine whether the age i
> The distribution of the ages of the winners of the Tour de France from 1903 to 2016 is approximately bell-shaped. The mean age is 27.9Â years, with a standard deviation of 3.3 years. Use the corresponding z-score to determine whether the age i
> Construct a frequency distribution and a relative frequency histogram for the data set using five classes. Which class has the greatest relative frequency and which has the least relative frequency? Fijian Banded Iguanas Data set: Lengths (in centime
> The distribution of the ages of the winners of the Tour de France from 1903 to 2016 is approximately bell-shaped. The mean age is 27.9Â years, with a standard deviation of 3.3 years. Use the corresponding z-score to determine whether the age i
> The distribution of the ages of the winners of the Tour de France from 1903 to 2016 is approximately bell-shaped. The mean age is 27.9Â years, with a standard deviation of 3.3 years. Use the corresponding z-score to determine whether the age i
> The distribution of the ages of the winners of the Tour de France from 1903 to 2016 is approximately bell-shaped. The mean age is 27.9Â years, with a standard deviation of 3.3 years. Use the corresponding z-score to determine whether the age i
> The midpoints A, B, and C are marked on the histogram at the left. Match them with the indicated z-scores. Which z-scores, if any, would be considered unusual? z = 0.77, z = 1.54, z = -1.54 Physics Test Scores 16 14- 12 10 2 26 Score (out of 30) в с
> The midpoints A, B, and C are marked on the histogram at the left. Match them with the indicated z-scores. Which z-scores, if any, would be considered unusual? z = 0, z = 2.14, z = -1.43 Applied Statisties Test Scores 16 14 12 10 6- 4- 2 48 53 58 63
> Use the data set, which represents wait times (in minutes) for various services at a state’s Department of Motor Vehicles locations. Which wait times are between the 25th and 75th percentiles? 4. 10 13 14 17 4 27 4 8 4 5 3. 264
> A student’s IQ score is in the 91st percentile on the Weschler Adult Intelligence Scale. Make an observation about the student’s IQ score.
> Use the data set, which represents wait times (in minutes) for various services at a state’s Department of Motor Vehicles locations. Find the percentile that corresponds to a wait time of 20 minutes. 4. 10 13 14 17 4 27 4 8 4 5 3.
> Use the data set, which represents wait times (in minutes) for various services at a state’s Department of Motor Vehicles locations. Which wait time represents the 50th percentile? How would you interpret this? 4. 10 13 14 17 4 27
> Use the data set, which represents wait times (in minutes) for various services at a state’s Department of Motor Vehicles locations. Draw an ogive to show corresponding percentiles for the data. 4. 10 13 14 17 4 27 4 8 4 5 3. 264
> Construct a frequency distribution and a relative frequency histogram for the data set using five classes. Which class has the greatest relative frequency and which has the least relative frequency? Years of Service Data set: Years of service of 28 O
> Use the data set, which represents the ages of 30 executives. Which ages are below the 25th percentile? 43 57 65 47 57 41 56 53 61 54 56 50 66 56 50 61 47 40 50 43 54 41 48 45 28 35 38 43 42 44
> Use the data set, which represents the ages of 30 executives. Which ages are above the 75th percentile? 43 57 65 47 57 41 56 53 61 54 56 50 66 56 50 61 47 40 50 43 54 41 48 45 28 35 38 43 42 44
> Use the data set, which represents the ages of 30 executives. Find the percentile that corresponds to an age of 56 years old. 43 57 65 47 57 41 56 53 61 54 56 50 66 56 50 61 47 40 50 43 54 41 48 45 28 35 38 43 42 44
> Use the data set, which represents the ages of 30 executives. Find the percentile that corresponds to an age of 40 years old. 43 57 65 47 57 41 56 53 61 54 56 50 66 56 50 61 47 40 50 43 54 41 48 45 28 35 38 43 42 44
> Use the ogive, which represents the cumulative frequency distribution for quantitative reasoning scores on the Graduate Record Examination in a recent range of years. What percentile is a score of 170? How should you interpret this? Quantitative Rea
> Use the ogive, which represents the cumulative frequency distribution for quantitative reasoning scores on the Graduate Record Examination in a recent range of years. What percentile is a score of 140? How should you interpret this? Quantitative Rea
