The average weight of a sample of women who attend aerobics classes at the YWCA is 130 pounds.We construct a confidence interval (using an alpha of 0.05)of$\pm$3.45.The upper and lower limits of our estimate are
A)130.00 and 133.45.
B)126.55 and 130.45.
C)126.55 and 133.45.
D)unknown;these values will depend on the number of women who are truly serious about exercising.

Question

Quizplus · Accepted Answer

The upper limit of the confidence interval would be 130 + 3.45, which equals 133.45. The lower limit would be 130 - 3.45, which equals 126.55. Therefore, the answer is C. Option D is incorrect because the number of women serious about exercising does not affect the confidence interval.

The Average Weight of a Sample of Women Who Attend ±\pm±

The Average Weight of a Sample of Women Who Attend $\pm$