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compute the value of the appropriate statistic

A lab technician is tested for her consistency by taking multiple measurements of cholesterol levels from the same blood sample. The target accuracy has an average of 2.78 or less with a standard deviation of 1.17. If the lab technician takes 16 measurements and the variance of the measurements in the sample is 2.45, does this provide enough evidence to reject the claim that the lab technician's accuracy is within the target accuracy?

Compute the value of the appropriate test statistic.

These are the options,