The mean and standard deviation of the sample − 400 , − 500 , − 200 , − 700 , − 100 , 900 , − 100 , − 700 , 400 , − 100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

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Answer 1

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Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

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Answer 2

Question

Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

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Answer 3

Question

Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

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Answer 4

Question

Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

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Answer 5

Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

Answer 6

Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

Answer 7

Chapter 9.4, Problem 29E

(a)

To determine

To calculate: The mean and standard deviation of the sample −400,−500,−200,−700,−100,900,−100,−700,400,−100 showing the changes of day-to-day in the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days around the start of the financial crisis in October 2008 is:

Answer 8

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

Answer 9

(b)

To determine

To fill: The blank in the statement “Assuming that the distribution of day-by-day changes of the Dow during the financial crisis is symmetric and bell-shaped, then the Dow falls by more than _______ points 16% of the time.” Also, estimate the percentage of times in the sample that the Dow actually fell by more than that amount.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 9.1 - In Exercises 110, classify the random variable X...Ch. 9.1 - Prob. 2E Ch. 9.1 - In Exercises 110, classify the random variable X...Ch. 9.1 - In Exercises 110, classify the random variable X...Ch. 9.1 - Prob. 5E Ch. 9.1 - In Exercises 110, classify the random variable X...Ch. 9.1 - Prob. 7E Ch. 9.1 - In Exercises 110, classify the random variable X...Ch. 9.1 - In Exercises 110, classify the random variable X...Ch. 9.1 - In Exercises 110, classify the random variable X...

Solution Summary: The author calculates the mean and standard deviation of the Dow Jones Industrial Average, rounded to nearest 100 points during 10 successive business days.

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