6th Edition

ISBN: 9780134434681

Author: Tom Pirnot

Publisher: PEARSON

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…

Mean, Median, Mode

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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 14.2, Problem 31E

Exam scores. Izzy had an 84 and an 86 on his first two tests and believed that he did well enough on his final exam to keep his B average. However, when he got his grade he received a D. He checked with his instructor and learned that the instructor had made a mistake by transposing the digits when he recorded the final exam grade. If lzzy’s incorrect average (mean) for the class was 69 , what was his correct final exam score?

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Chapter 14.2, Problem 30E

Chapter 14.2, Problem 32E

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Chapter 14 Solutions

Mathematics All Around (6th Edition)

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Solution Summary: The author explains that Izzy's correct final exam score is 73. He had an 84 and 86 on his first two tests and believed that he did well enough to keep his B average.

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