7th Edition

ISBN: 9781323839577

Author: Larson

Publisher: Pearson Custom Publishing

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Chapter 8.2, Problem 1TY

The annual earnings of 25 people with a high school diploma and 16 people with an associate’s degree are shown at the left. Can you conclude that there is a difference in the mean annual earnings based on level of education? Use α = 0.05. Assume the populations are normally distributed and the population variances are not equal. (Adapted from U.S. Census Bureau)

Chapter 8.2, Problem 1TY, The annual earnings of 25 people with a high school diploma and 16 people with an associates degree

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 8.1, Problem 30E

Chapter 8.2, Problem 2TY

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Solution Summary: The author evaluates whether there is a difference in the mean annual earnings based on level of education.

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