In Example 3, find and interpret the z-score of an achievement test score of 630. Data from
Question:
In Example 3, find and interpret the z-score of an achievement test score of 630.
Data from Example 3
Using the mean and standard deviation given in Example 2, find and interpret the z-scores of achievement test results of (a) 610 and (b) 435.
(a) The test result of 610 has a z-score of
This test result is 2.2 standard deviations above the mean. This is a very high test score, which is rarely obtained.
(b) The test result of 435 has a z-score of
This test result is 1.3 standard deviations below the mean. This score is below the mean, but fairly typical.
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Related Book For
Basic Technical Mathematics
ISBN: 9780137529896
12th Edition
Authors: Allyn J. Washington, Richard Evans
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