10th Edition

ISBN: 9780321989178

Author: Neil A. Weiss

Publisher: PEARSON

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Textbook Question

Chapter 9.5, Problem 100E

Fill in the following blanks.

a. The t-test is ____ to moderate violations of the normality assumption.
b. The t-test can sometimes be unduly affected by outliers because the sample mean and sample standard deviation are not ___ to outliers.

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 9.5, Problem 99E

Chapter 9.5, Problem 101E

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Chapter 9 Solutions

Introductory Statistics (10th Edition)

Ch. 9.1 - Explain the meaning of the term hypothesis as used...Ch. 9.1 - Regarding the term null hypothesis: a. Originally,...Ch. 9.1 - What role does the decision criterion play in a...Ch. 9.1 - Suppose that you want to perform a hypothesis test...Ch. 9.1 - Suppose that you are considering a hypothesis test...Ch. 9.1 - Suppose that, in a hypothesis test, the null...Ch. 9.1 - Suppose that, in a hypothesis test, the null...Ch. 9.1 - What is the relation between the significance...Ch. 9.1 - Answer true or false and explain your answer: If...Ch. 9.1 - Answer true or false and explain your answer: For...

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Fill in the following blanks. a. The t -test is __ to moderate violations of the normality assumption. b. The t -test can sometimes be unduly affected by outliers because the sample mean and sample standard deviation are not _ to outliers.

Solution Summary: The author explains the role of t-test to moderate violations of the normality assumption.

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Chapter 9 Solutions

Fill in the following blanks. a. The t -test is ____ to moderate violations of the normality assumption. b. The t -test can sometimes be unduly affected by outliers because the sample mean and sample standard deviation are not ___ to outliers.

Solution Summary: The author explains the role of t-test to moderate violations of the normality assumption.

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Chapter 9 Solutions

Fill in the following blanks. a. The t -test is __ to moderate violations of the normality assumption. b. The t -test can sometimes be unduly affected by outliers because the sample mean and sample standard deviation are not _ to outliers.