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A sample of 12 measurements has a mean of 38 and a standard deviation of 3.75....

A sample of 12 measurements has a mean of 38 and a standard deviation of 3.75. Suppose that the sample is enlarged to 14 measurements, by including two additional measurements having a common value of 38 each. (round your answer to four decimal place)

A.Find the mean of the sample of 14 measurements

B. Find the standard deviation of the sample of 14 measurements.

Math   Statistics-And-Probability   
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