7th Edition

ISBN: 9780135901021

Author: Larson

Publisher: PEARSON EDUCATION (COLLEGE)

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Chapter 8.2, Problem 16E

Testing the Difference Between Two Means in Exercises 13–22, (a) identify the claim and state H₀ and H_a, (b) find the critical value(s) and identify the rejection region(s), (c) find the standardized test statistic t, (d) decide whether to reject or fail to reject the null hypothesis, and (e) interpret the decision in the context of the original claim. Assume the samples are random and independent, and the populations are normally distributed.

16. Yellowfin Tuna A marine biologist claims that the mean fork length (sec figure at the left) of yellowfin tuna is different in two zones in the eastern tropical Pacific Ocean. A sample of 26 yellowfin tuna collected in Zone A has a mean fork length of 76.2 centimeters and a standard deviation of 16.5 centimeters. A sample of 31 yellowfin tuna collected in Zone B has a mean fork length of 80.8 centimeters and a standard deviation of 23.4 centimeters. At α = 0.01, can you support the marine biologist’s claim? Assume the population variances are equal. (Adapted from Fishery Bulletin)

Chapter 8.2, Problem 16E, Testing the Difference Between Two Means in Exercises 1322, (a) identify the claim and state H0 and

FIGURE FOR EXERCISE 16

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 8.2, Problem 15E

Chapter 8.2, Problem 17E

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Chapter 8 Solutions

MYLAB STATISTICS: ELEMENTARY STATISTICS

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Solution Summary: The author explains the claim that the mean fork length of yellowfin tuna is different in two zones in the eastern tropical Pacific Ocean

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