Following are weights, in pounds, of 12 two-month-old baby girls. It is reasonable to assume that the population is approximately normal.

a. Construct a 98% confidence interval for the mean weight of two-month-old baby girls.

b. According to the National Health Statistics Reports, the mean weight of two-month-old baby boys is 11.5 pounds.
Based on the confidence interval, is it reasonable to believe that the mean weight of two-month-old baby girls may be the same as that of two-month-old baby boys? Explain.

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12.23 12.32 11.87 12.34 11.48 12.66 12.95 10.30 9.34 8.63 8.51 14.13 12.95 14.13