MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Concept explainers

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
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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…
Topic Video
Question

Based on the following frequency distribution, what proportion of students had a grade of 60- 69?

Test Grades                    F

30 - 39                             8

40 - 49                             7

50 - 59                             5

60 - 69                             4

70 - 79                             3

80 - 89                             2

90 - 99                             1

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