4th Edition

ISBN: 9781259746826

Author: Bluman

Publisher: MCG

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In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.

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Textbook Question

Chapter 13.2, Problem 12E

Deaths due to Severe Weather A meteorologist suggests that the median number of deaths per year from tornadoes in the United States is 60. The number of deaths for a randomly selected sample of 11 years is shown. At α = 0.05, is there enough evidence to reject the claim? If you took proper safety precautions during a tornado, would you feel relatively safe?

Chapter 13.2, Problem 12E, Deaths due to Severe Weather A meteorologist suggests that the median number of deaths per year from

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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Chapter 13.2, Problem 11E

Chapter 13.2, Problem 13E

Chapter 13 Solutions

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Solution Summary: The author explains the claim that the median number of deaths per year from tornadoes in the United States is not same as 60.

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