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 ± 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.
ANSWER: c
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