A college placement office sent a questionnaire to a sample of business school graduates requesting information on monthly starting salaries. The data consists on values 3450, 3490, 3550, 3730, 3650, 3540, 3480, 3925, 3355, 3520, 3310, 3480. a. Find mean monthly starting salary for the sample of 12 business college graduates. b. Find variance for starting salary for the sample of 12 business college graduates.

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