Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 20. Use the empirical rule to determine the following. (a) What percentage of people has an IQ...

Scores of an IQ test have a bell-shaped distribution with a mean of

100

and a standard deviation of

20.

Use the empirical rule to determine the following.

(a) What percentage of people has an IQ score between

and

120?

(b) What percentage of people has an IQ score less than

or greater than

160?

140?

Jun 07, 2022

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