For the following set of data, find the percentage of data within 2 population standard deviations of the mean, to the nearest

Question

For the following set of data, find the percentage of data within 2 population standard deviations of the mean, to the nearest 10th of a percent.
Data     Frequency
12         2
14         7
16         9
18.       14
34       16
36       10
37        7
41         1

Kunduz · Accepted Answer

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