Elementary Statistics: Picturing the World (6th Edition)

6th Edition

ISBN: 9780321911216

Author: Ron Larson, Betsy Farber

Publisher: PEARSON

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Inverse Normal Distribution

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…

Mean, Median, Mode

It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency o…

Z-Scores

A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow compar…

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Textbook Question

Chapter 11.3, Problem 7E

Comparing Two Tests In Exercises 7 and 8,

(a) perform a Kruskal-Wallis test.
(b) perform a one-way ANOVA test, assuming that each population is normally distributed and the population variances are equal.
(c) Compare the results.

7. Hospital Patient Stays An insurance underwriter claims that the number of days patients spend in the hospital is different in at least one region of the United States. The table shows the numbers of days randomly selected patients spent in the hospital in four U.S. regions. At a = 0.01, can you support the underwriter's claim? (Adapted from U.S. National Center for Health Statistics)

Chapter 11.3, Problem 7E, Comparing Two Tests In Exercises 7 and 8, (a) perform a Kruskal-Wallis test. (b) perform a one-way

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 11.3, Problem 6E

Chapter 11.3, Problem 8E

Chapter 11 Solutions

Elementary Statistics: Picturing the World (6th Edition)

Ch. 11.1 - Prob. 1TY Ch. 11.1 - Prob. 2TY Ch. 11.1 - Prob. 3TY Ch. 11.1 - Prob. 1E Ch. 11.1 - When the sign test is used, what population...Ch. 11.1 - Describe the test statistic for the sign test when...Ch. 11.1 - In your own words, explain why the hypothesis test...Ch. 11.1 - Explain how to use the sign test to test a...Ch. 11.1 - List the two conditions that must be met in order...Ch. 11.1 - Prob. 7E

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Solution Summary: The author states that there is no evidence to support the claim that the number of days patients spent in the hospital is different in at least one region of the United States.

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Chapter 11 Solutions