Question

Use the normal distribution to the right to answer the questions. ​(a) What percent of the...

Use the normal distribution to the right to answer the questions. ​(a) What percent of the scores are less than​ 19? ​(b) Out of 1500 randomly selected​ scores, about how many would be expected to be greater than​ 21? mean: 20.7 and standadr deviation: 5.2

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Answer #1

Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(-0.33, TRUE)" to find the probability.

Convert the answer to a percentage.

The percent of the scores that are less than​ 19 is

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Refer Z-table to find the probability or use excel formula "=NORM.S.DIST(0.66, TRUE)" to find the probability.

About scores would be expected to be greater than​ 21.

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