In each of the following studies a single sample's mean is being compared to a population with a known mean and an unknown variance. For each study decide whether the result is significant.
Sample Size Population Mean Estimated Pop. Variance Sample Mean Tails Level
A (N) (S 2nd power) (M)
(a) 64 12.40 9.00 11.00 1 (low .05
(b) 49 1,006.35 317.91 1,009.72 2 (high .01
(c) 400 52.00 7.02 .01
This solution gives calculations for determining significance for various studies.