For a population of people who completed their GED, the average at completion wa

Question

For a population of people who completed their GED, the average at completion was 29.0 and the standard deviation was 4.0 The distributions of ages was approximately bell-shaped. Compute the z-score for an individual who completed their GED at the age of 20. Write only a number as your answer. (for example: 3.15). Following are the bills, rounded to the nearest dollar, for a sample of 20 couplet at a restaurant. 6, 15, 21, 21, 23, 23, 24, 26, 27, 30, 30, 31, 37, 51, 61, 62, 63, 63, 64, 73 What is the 65 th percentile? Write only a number as you, answer You may need to round to on. decimal place.

Explanation / Answer

= 29, = 4, x = 20

z = (x - )/

z = (20 - 29)/4 = -2.25

The z- score is -2.25.

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