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A study is run to estimate the mean total cholesterol level in students grades 5 - 8. A sample of 9 participants is selected and

A study is run to estimate the mean total cholesterol level in students grades 5 - 8.

A sample of 9 participants is selected and their total cholesterol levels are measured as follows.

132 138 168 178 192 194 222 186 230

What is the variance of this data (choose the closest answer)?

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