7th Edition

ISBN: 9780100547568

Author: BRASE

Publisher: YUZU

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A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 7.5, Problem 5P

Basic Computation: Central Limit Theorem Suppose x has a distribution with a mean of 8and a standard deviation of 16. Random samples of size n = 64 are drawn.

(a) Describe the x distribution and compute the mean and standard deviation of the distribution.

(b) Find the z value corresponding to x ¯ = 9.

(d) Interpretation Would it be unusual for a random sample of size 64 from the x distribution to have a sample mean less than 9? Explain.

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.

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Chapter 7.5, Problem 4P

Chapter 7.5, Problem 6P

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Solution Summary: The author calculates the mean and standard deviation of the distribution when x has a distribution of 8 and 16 and random samples of size n=64.

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