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11th Edition

Ronald J. Harshbarger + 1 other

Publisher: Cengage Learning

ISBN: 9781305108042

Chapter 8.4, Problem 15E

Textbook Problem

Suppose a population of scores *x* is normally distributed with

**= 20 and**

= 5. In Problems 15-18, use the standard normal distribution to find the probabilities indicated.

Mathematical Applications for the Management, Life, and Social Sciences

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Ch. 8.1 - Determine whether the following experiments...Ch. 8.1 - Determine whether the following experiments...Ch. 8.1 - Determine whether the following experiments...Ch. 8.1 - 4. A bag contains five red balls and three white...Ch. 8.1 - 1. Suppose a fair die is rolled 18 times.
(a) What...Ch. 8.1 - 2. Suppose a fair coin is tossed 12 times.
(a)...Ch. 8.1 - If the probability of success on each trial of an...Ch. 8.1 - If the probability of success on each trial of an...Ch. 8.1 - Suppose a fair coin is tossed 6 times. What is the...Ch. 8.1 - If a fair die is rolled 3 times, what is the...

Ch. 8.1 - In Problem 7, what is the probability that no aces...Ch. 8.1 - A bag contains 6 red balls and 4 black balls. We...Ch. 8.1 - A bag contains 6 red balls and 4 black balls. If...Ch. 8.1 - 11. Suppose a pair of dice is thrown 4 times. What...Ch. 8.1 - 12. If a pair of dice is thrown 4 times, find the...Ch. 8.1 - 13. Suppose the probability that a marksman will...Ch. 8.1 - 14. The probability that a sharpshooter will hit a...Ch. 8.1 - 15. Genetics A family has 4 children. If the...Ch. 8.1 - 16. Testing A multiple-choice test has 10...Ch. 8.1 - Management The manager of a store buys weather...Ch. 8.1 - Quality control A hospital buys thermometers in...Ch. 8.1 - Genetics The probability that a certain couple...Ch. 8.1 - Genetics If the probability that a certain couple...Ch. 8.1 - 21. Health care Suppose that of the patients who...Ch. 8.1 - 22. Employee benefits In a certain school...Ch. 8.1 - 23. Genetics If the ratio of boys born to girls...Ch. 8.1 - 24. Biology It has been determined empirically...Ch. 8.1 - 25. Insurance If records indicate that 4 houses...Ch. 8.1 - 26. Psychology Suppose 4 rats are placed in a...Ch. 8.1 - 27. Sports A baseball player has a lifetime...Ch. 8.1 - 28. Quality control If the probability of an...Ch. 8.1 - 29. Quality control A company produces shotgun...Ch. 8.1 - 30. Quality control A baseball pitching machine...Ch. 8.1 - 31. Testing A quiz consists of 10 multiple-choice...Ch. 8.1 - 32. Demographics In a certain community, 10% of...Ch. 8.1 - 33. Suicide rates Suppose the probability of...Ch. 8.2 - Consider the data 10, 12, 12, 8, 30, 12, 8, 10, 5,...Ch. 8.2 - Consider the data 10, 12, 12, 8, 30, 12, 8, 10, 5,...Ch. 8.2 - Consider the data 10, 12, 12, 8, 30, 12, 8, 10, 5,...Ch. 8.2 - 4. Find the standard deviation of the data:
10,...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Construct frequency histograms for the data given...Ch. 8.2 - Find the modes of the sets of scores in Problems...Ch. 8.2 - Find the modes of the sets of scores in Problems...Ch. 8.2 - Find the modes of the sets of scores in Problems...Ch. 8.2 - Find the modes of the sets of scores in Problems...Ch. 8.2 - Find the medians of the sets of scores in Problems...Ch. 8.2 - Find the medians of the sets of scores in Problems...Ch. 8.2 - Find the medians of the sets of scores in Problems...Ch. 8.2 - Find the medians of the sets of scores in Problems...Ch. 8.2 - Find the modes, medians, and means of the scores...Ch. 8.2 - Find the modes, medians, and means of the scores...Ch. 8.2 - Find the modes, medians, and means of the scores...Ch. 8.2 - Find the modes, medians, and means of the scores...Ch. 8.2 - Find the modes, medians, and means of the scores...Ch. 8.2 - Find the modes, medians, and means of the scores...Ch. 8.2 - Use class marks to find the mean, mode, and median...Ch. 8.2 - Use class marks to find the mean, mode, and median...Ch. 8.2 - In Problems 25-28, find the range of the set of...Ch. 8.2 - In Problems 25-28, find the range of the set of...Ch. 8.2 - In Problems 25-28, find the range of the set of...Ch. 8.2 - In Problems 25-28, find the range of the set of...Ch. 8.2 - Find the mean, variance, and standard deviation of...Ch. 8.2 - Find the mean, variance, and standard deviation of...Ch. 8.2 - Find the mean, variance, and standard deviation of...Ch. 8.2 - Find the mean, variance, and standard deviation of...Ch. 8.2 - In Problems 33-36, find the mean and standard...Ch. 8.2 - In Problems 33-36, find the mean and standard...Ch. 8.2 - In Problems 33-36, find the mean and standard...Ch. 8.2 - In Problems 33-36, find the mean and standard...Ch. 8.2 - Assume all data are sample data.
38. Youth...Ch. 8.2 - Assume all data are sample data.
39. Cell phones...Ch. 8.2 - Assume all data are sample data.
40. Product...Ch. 8.2 - Real estate Use the following information for...Ch. 8.2 - Real estate Use the following information for...Ch. 8.2 - Real estate Use the following information for...Ch. 8.2 - Assume all data are sample data.
43. Renewable...Ch. 8.2 - Assume all data are sample data.
44. Malpractice...Ch. 8.2 - Salaries S S Printing has 15 employees and 5 job...Ch. 8.2 - Assume all data are sample data.
49. Salaries...Ch. 8.2 - Assume all data are sample data.
50. Sales A new...Ch. 8.2 - Assume all data are sample data.
51. Insurance...Ch. 8.2 - Assume all data are sample data.
52. Youth...Ch. 8.2 - Assume all data are sample data.
53. Public...Ch. 8.2 - Assume all data are sample data.
54. Private...Ch. 8.3 - 1. Consider a game in which you roll a the and...Ch. 8.3 - 2. An experiment has the following possible...Ch. 8.3 - 3. Show that the values of x and the associated...Ch. 8.3 - 4. A fair cube is colored so that 4 faces are...Ch. 8.3 - Determine whether each table in Problems 1-4...Ch. 8.3 - Determine whether each table in Problems 1-4...Ch. 8.3 - Determine whether each table in Problems 1-4...Ch. 8.3 - Determine whether each table in Problems 1-4...Ch. 8.3 - Determine whether each formula in Problems 5-8...Ch. 8.3 - Determine whether each formula in Problems 5-8...Ch. 8.3 - Determine whether each formula in Problems 5-8...Ch. 8.3 - Determine whether each formula in Problems 5-8...Ch. 8.3 - Each of the tables in Problems 9-12 defines a...Ch. 8.3 - Each of the tables in Problems 9-12 defines a...Ch. 8.3 - Each of the tables in Problems 9-12 defines a...Ch. 8.3 - Each of the tables in Problems 9-12 defines a...Ch. 8.3 - In Problems 13-16, find the mean, variance, and...Ch. 8.3 - In Problems 13-16, find the mean, variance, and...Ch. 8.3 - In Problems 13-16, find the mean, variance, and...Ch. 8.3 - In Problems 13-16, find the mean, variance, and...Ch. 8.3 - 17. Suppose an experiment has six possible...Ch. 8.3 - 18. Suppose an experiment has six possible...Ch. 8.3 - 19. Five slips of paper containing the numbers 0,...Ch. 8.3 - 20. An experiment consists of rolling a the once....Ch. 8.3 - 21. A die is rolled 3 times, and success is...Ch. 8.3 - 22. A die is rolled 3 times. Success is rolling a...Ch. 8.3 - 23. A variable x has a binomial distribution with...Ch. 8.3 - 24. A variable x has a binomial distribution with...Ch. 8.3 - 25. A coin is “loaded” so that the probability of...Ch. 8.3 - 26. Suppose a pair of dice is thrown 1200 times....Ch. 8.3 - 27. Suppose a pair of dice is thrown 900 times....Ch. 8.3 - 28. Suppose a the is “loaded” so that the...Ch. 8.3 - 29. Expand .
Ch. 8.3 - 30. Expand
Ch. 8.3 - 31. Expand .
Ch. 8.3 - 32. Write the general expression for.
Ch. 8.3 - 33. Animal relocation In studying endangered...Ch. 8.3 - Raffle A charity sells 1000 raffle tickets for $1...Ch. 8.3 - 35. Campaigning A candidate must decide whether he...Ch. 8.3 - 36. Genetics If the probability that a newborn...Ch. 8.3 - 37. Raffle A nonprofit organization sells chances...Ch. 8.3 - 38. Lottery A charity sells raffle tickets for $1...Ch. 8.3 - 39. Gambling Suppose a student is offered a chance...Ch. 8.3 - Revenue The Rent-to-Own Company estimates that 35%...Ch. 8.3 - 41. Sales A young man plans to sell umbrellas at...Ch. 8.3 - 42. Advertising A candidate must decide whether he...Ch. 8.3 - Insurance A car owner must decide whether she...Ch. 8.3 - 44. Altimeters Suppose a company manufactures...Ch. 8.3 - 45. Machining A machinist makes pipes with an...Ch. 8.3 - Budgeting Suppose a youth has a part-time job in...Ch. 8.3 - 47. Health care Suppose that 10% of the patients...Ch. 8.3 - 48. Cancer research Suppose it has been determined...Ch. 8.3 - Voting A candidate claims that 60% of the voters...Ch. 8.3 - Genetics In a family with 2 children, the...Ch. 8.3 - Voting If the number of votes the candidate in...Ch. 8.3 - Genetics Suppose in Problem 50 that of the 1200...Ch. 8.3 - 51. Testing A multiple-choice test has 20...Ch. 8.3 - 52. Birth control Suppose a birth control pill is...Ch. 8.3 - 53. Quality control A certain calculator circuit...Ch. 8.3 - 54. CPA exam Forty-eight percent of accountants...Ch. 8.3 - 55. Seed germination A certain type of corn seed...Ch. 8.3 - 56. Quality control The probability that a...Ch. 8.4 - 1. The mean of a normal distribution is 25, and...Ch. 8.4 - 2. For the standard normal distribution, find the...Ch. 8.4 - 3. For the normal distribution with mean 70 and...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Find the probability that a z-score from the...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - Suppose a population of scores x is normally...Ch. 8.4 - 27. Find the number A that satisfies for the...Ch. 8.4 - 28. Find the number A that satisfies for the...Ch. 8.4 - 29. The random variable x has a normal...Ch. 8.4 - 30. The random variable x has a normal...Ch. 8.4 - 31. Growth The Fish Commission states that the...Ch. 8.4 - 32. Butterfat A quart of Parker's milk contains a...Ch. 8.4 - 33. Growth The heights of a certain species of...Ch. 8.4 - 34. Mating calls The durations of the mating calls...Ch. 8.4 - 35. Growth The mean weight of a group of boys is...Ch. 8.4 - 36. Testing The Scholastic Aptitude Test (SAT)...Ch. 8.4 - 37. Mileage A certain model of automobile has its...Ch. 8.4 - 38.Quality control A machine precision-cuts tubing...Ch. 8.4 - 39. Blood pressure Systolic blood pressure for a...Ch. 8.4 - 40. Industrial waste In a certain state, the daily...Ch. 8.4 - 41. Reaction time Reaction time is normally...Ch. 8.4 - 42. Inventory Suppose that the electrical supplies...Ch. 8.4 - 43. Test results At a major university, exam...Ch. 8.4 - Budgeting The amount spent monthly, x, for...Ch. 8.4 - 45. Quality control The milk machine at a large...Ch. 8.4 - 46. Manufacturing A textile manufacturer produces...Ch. 8.4 - 47. College standards At a certain college, CPAs...Ch. 8.5 - 1. Which of the following binomial probability...Ch. 8.5 - 2. Suppose a binomial probability experiment has p...Ch. 8.5 - In Problems 1-4, indicate which of the binomial...Ch. 8.5 - In Problems 1-4, indicate which of the binomial...Ch. 8.5 - In Problems 1-4, indicate which of the binomial...Ch. 8.5 - In Problems 1-4, indicate which of the binomial...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - For the binomial experiments in Problems 5-18,...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8.5 - In the following problems, use a normal...Ch. 8 - 1. If the probability of success on each trial of...Ch. 8 - A bag contains 5 black balls and 7 white balls. If...Ch. 8 - 3. If a die is rolled 4 times, what is the...Ch. 8 - Use the data in the frequency table in Problems...Ch. 8 - Use the data in the frequency table in Problems...Ch. 8 - Use the data in the frequency table in Problems...Ch. 8 - Use the data in the frequency table in Problems...Ch. 8 - 8. Construct a frequency histogram for the...Ch. 8 - 9. What is the median of the scores in Problem...Ch. 8 - 10. What is the mean of the scores in Problem 8?
Ch. 8 - 11. What is the mean of the scores in Problem 8?
Ch. 8 - 12. Find the mean, variance, and standard...Ch. 8 - 13. Find the mean, variance, and standard...Ch. 8 - 14. For the following probability distribution,...Ch. 8 - Determine whether each function or table in...Ch. 8 - Determine whether each function or table in...Ch. 8 - Determine whether each function or table in...Ch. 8 - Determine whether each function or table in...Ch. 8 - 19. For the probability distribution shown, find...Ch. 8 - 20. For the discrete probability distribution...Ch. 8 - 21. For the probability distribution shown, find...Ch. 8 - 22. A coin has been altered so that the...Ch. 8 - 23. Suppose a pair of dice is thrown 18 times. How...Ch. 8 - 24. Expand .
Ch. 8 - 25. What is the area under the standard normal...Ch. 8 - 26. If z is a standard normal score, find .
Ch. 8 - 27. Find Pr .
Ch. 8 - 28. If a variable x is normally distributed, with ...Ch. 8 - 29. If a variable x is normally distributed, with ...Ch. 8 - 30. If a variable x is normally distributed, with ...Ch. 8 - 31. Find the number A so that for the standard...Ch. 8 - For the binomial distributions in Problems 32 and...Ch. 8 - For the binomial distributions in Problems 32 and...Ch. 8 - For the binomial experiments in Problems 34-37,...Ch. 8 - For the binomial experiments in Problems 34-37,...Ch. 8 - For the binomial experiments in Problems 34-37,...Ch. 8 - For the binomial experiments in Problems 34-37,...Ch. 8 - 38. Genetics Suppose the probability that a...Ch. 8 - 39. Sampling Suppose of a population opposes a...Ch. 8 - 40. Crime Suppose of the population are victims...Ch. 8 - 41. Disease One person in 100,000 develops a...Ch. 8 - Farm families The distribution of farm families...Ch. 8 - Farm families The distribution of farm families...Ch. 8 - Fanti families The distribution of farm families...Ch. 8 - 45. Cancer testing The probability that a man with...Ch. 8 - 46. Fraud A company selling substandard drugs to...Ch. 8 - 47. Racing Suppose you paid $2 for a bet on a...Ch. 8 - 48. Lotteries A state lottery pays $500 to anyone...Ch. 8 - 49. Crime Refer to Problem 40.
(a) What is the...Ch. 8 - 50. Testing Suppose the mean SAT score for...Ch. 8 - 51. Net worth Suppose the mean net worth of the...Ch. 8 - 52. Testing The length of time it takes to...Ch. 8 - In Problems 53-56, use a normal approximation.
53....Ch. 8 - In Problems 53-56, use a normal approximation.
54....Ch. 8 - In Problems 53-56, use a normal approximation.
55....Ch. 8 - In Problems 53-56, use a normal approximation.
56....Ch. 8 - 1. If a coin is “loaded” so that the probability...Ch. 8 - 2. Suppose the coin in Problem 1 is tossed 12...Ch. 8 - 3. If x is a random variable, what properties must...Ch. 8 - 4. Find the expected value of the variable x for...Ch. 8 - 5. For the probability distribution shown, find...Ch. 8 - 6. For the sample data in the table, find the...Ch. 8 - 7. If the variable x is normally distributed, with...Ch. 8 - 8. For the normal distribution with mean 70 and...Ch. 8 - 9. The random variable x has a normal distribution...Ch. 8 - 10. Use a normal approximation to a binomial...Ch. 8 - 11. Use a normal approximation to a binomial...Ch. 8 - The table gives the ages of a sample of...Ch. 8 - The table gives the ages of a sample of...Ch. 8 - 14. The table gives the projected 2020 population...Ch. 8 - 15. The table summarizes the number of mobile...Ch. 8 - 16. Suppose that 2% of the computer chips shipped...Ch. 8 - The table gives the percent of women who become...Ch. 8 - The table gives the percent of women who become...Ch. 8 - The table gives the percent of women who become...Ch. 8 - 20. A new light bulb has an expected life of...Ch. 8 - Hargray Communications offered a bundled package...Ch. 8 - One of the reasons the Powerball Lottery (offered...

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