18th Edition

ISBN: 9781265679637

Author: Lind

Publisher: MCG

Concept explainers

The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of tw…

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Z-Scores

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Textbook Question

Chapter 11, Problem 22CE

Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the night shift than on the day shift. The mean number of units produced by a sample of 54 day-shift workers was 345. The mean number of units produced by a sample of 60 night-shift workers was 351. Assume the population standard deviation of the number of units produced on the day shift is 21 and 28 on the night shift. Using the .05 significance level, is the number of units produced on the night shift larger?

a. State the null and alternate hypotheses.

b. Compute the test statistic.

c. Compute the p-value.

d. What is your decision regarding the null hypothesis?

e. Interpret the result.

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 11, Problem 21CE

Chapter 11, Problem 23CE

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Chapter 11 Solutions

STAT. TECH. FOR BUSINESS AND ECO (LL)

Ch. 11 - Tom Sevits is the owner of the Appliance Patch....Ch. 11 - Prob. 1E Ch. 11 - Prob. 2E Ch. 11 - Prob. 3E Ch. 11 - As part of a study of corporate employees, the...Ch. 11 - Prob. 5E Ch. 11 - Mary Jo Fitzpatrick is the vice president for...Ch. 11 - Prob. 2SR Ch. 11 - Prob. 7E Ch. 11 - For Exercises 7 and 8: (a) state the decision...

Ch. 11 - Prob. 9E Ch. 11 - A recent study compared the time spent together by...Ch. 11 - Ms. Lisa Monnin is the budget director for Nexus...Ch. 11 - The Tampa Bay (Florida) Area Chamber of Commerce...Ch. 11 - It is often useful for companies to know who their...Ch. 11 - For exercises 13 and 14, assume the sample...Ch. 11 - Prob. 14E Ch. 11 - Prob. 15E Ch. 11 - Suppose you are an expert on the fashion industry...Ch. 11 - Prob. 4SR Ch. 11 - Prob. 17E Ch. 11 - The null and alternate hypotheses are: H0:d=a0...Ch. 11 - Prob. 19E Ch. 11 - Prob. 20E Ch. 11 - A recent study focused on the number of times men...Ch. 11 - Clark Heter is an industrial engineer at Lyons...Ch. 11 - Prob. 23CE Ch. 11 - Prob. 24CE Ch. 11 - Prob. 25CE Ch. 11 - Prob. 26CE Ch. 11 - Prob. 27CE Ch. 11 - Prob. 28CE Ch. 11 - Prob. 29CE Ch. 11 - Prob. 30CE Ch. 11 - Prob. 31CE Ch. 11 - Prob. 32CE Ch. 11 - Prob. 33CE Ch. 11 - Prob. 34CE Ch. 11 - Prob. 35CE Ch. 11 - Prob. 36CE Ch. 11 - Prob. 37CE Ch. 11 - Prob. 38CE Ch. 11 - Prob. 39CE Ch. 11 - Prob. 40CE Ch. 11 - Prob. 41CE Ch. 11 - Prob. 42CE Ch. 11 - Prob. 43CE Ch. 11 - Prob. 44CE Ch. 11 - Prob. 45CE Ch. 11 - Prob. 46CE Ch. 11 - Prob. 47DA Ch. 11 - Prob. 49DA

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Solution Summary: The author explains the null hypothesis and the alternative hypothesis.

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Chapter 11 Solutions