The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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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 6CR

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To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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Solve the following problems.a. After 8 points are added to each score in a sample, the mean is found to be M = 40. What was the value for the original mean?b. After every score in a sample is multiplied by 5, the mean is found to be M = 40. What was the value for the original mean?

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In a population of scores, x=45 corresponds to z=+2.00 and x=30 corresponds to z=-1.00 what is the population mean

Answer 2

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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 6CR

To determine

To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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Answer 3

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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 6CR

To determine

To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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Answer 4

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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 6CR

To determine

To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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Answer 5

Chapter 8, Problem 6CR

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To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

Answer 6

Chapter 8, Problem 6CR

To determine

To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

Answer 7

Chapter 8, Problem 6CR

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To find: The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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The sample size needed to be 99% confident that the sample mean score is within 2 points of the population mean score for students who are high on the need for closure.

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