Find the sample mean find the sample standard deviation

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Reference no: EM13620191

The state test scores for 12 randomly selected high school seniors are shown on the right. Assume the population is normally distibuted.

1425 1225 988

694 727 839

721 745 543

621 1449 943

a) Find the sample mean

b) Find the sample standard deviation

c.) Construct a 90% confidence interval for the population mean u.

Reference no: EM13620191

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