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Chapter 7: Q.10 (page 428)

Find the sum that is 1.5 standard deviations below the mean of the sums.

Short Answer

Expert verified

The sum is鈭�X=7424.5577.

Step by step solution

01

Given Information

A sample size (n)=95.

The mean of population 渭X=80.

z=1.5

A standard deviation 蟽X=12.

02

Explanation

To find the sum that is1.5standard deviation below the mean of the sums:

鈭�X=(n)渭X-(z)(n)蟽X

Calculating, we have:

鈭�X=95脳80-1.5脳95脳12

鈭�X=7424.5577

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