The shape of the distribution of the sample mean time.

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Answer 1

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Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

(b)

To determine

To find: The standard error of the mean time.

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

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Answer 2

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

(b)

To determine

To find: The standard error of the mean time.

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

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Answer 3

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

(b)

To determine

To find: The standard error of the mean time.

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

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Answer 4

Question

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

(b)

To determine

To find: The standard error of the mean time.

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

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Answer 5

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

(b)

To determine

To find: The standard error of the mean time.

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

Answer 6

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

Answer 7

Chapter 8, Problem 32CE

(a)

To determine

To describe: The shape of the distribution of the sample mean time.

Answer 8

(b)

To determine

To find: The standard error of the mean time.

Answer 9

(b)

To determine

To find: The standard error of the mean time.

Answer 10

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

Answer 11

(c)

To determine

To find: The percent of the sample means will be greater than 31.25 seconds.

Answer 12

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

Answer 13

(d)

To determine

To find: The percent of the sample means will be greater than 28.25 seconds.

Answer 14

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

Answer 15

(e)

To determine

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

Answer 16

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

Answer 17

(f)

To determine

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

Answer 18

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Answer 19

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Answer 20

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Answer 21

Ch. 8 - Prob. 1SR Ch. 8 - Prob. 2SR Ch. 8 - The following is a list of 24 Marcos Pizza stores...Ch. 8 - The following is a list of 29 hospitals in the...Ch. 8 - Listed below are the 35 members of the Metro...Ch. 8 - Listed next are the 27 Nationwide Insurance agents...Ch. 8 - The years of service of the five executives...Ch. 8 - Prob. 5E Ch. 8 - Prob. 6E Ch. 8 - Prob. 7E

The shape of the distribution of the sample mean time.

To describe: The shape of the distribution of the sample mean time.

To find: The standard error of the mean time.

To find: The percent of the sample means will be greater than 31.25 seconds.

To find: The percent of the sample means will be greater than 28.25 seconds.

To find: The percent of the sample means will be greater than 28.25 but less than 31.25 seconds.

To find: The probability that the sampling error would be less than or more than 1.5 seconds.

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Chapter 8 Solutions