SOLUTION: Q: In July, 1969 the first man walked on the moon. Armstrong, Aldren and Collins brought back 64 rock samples. The rocks had an average Earth weight of 172 ounces. The sample sta
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Question 1159095: Q: In July, 1969 the first man walked on the moon. Armstrong, Aldren and Collins brought back 64 rock samples. The rocks had an average Earth weight of 172 ounces. The sample standard deviation was 20 ounces. Find 99% C.I for the mean weight of rocks on the lunar surface.Use level of significance as 5%. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! half-interval is t(0.995, df=63)*s/sqrt(n)
t=2.656
half-interval is 2.656*20/sqrt(64)=6.64. oz
add and subtract that from the mean
(165.36, 178.64) units oz.
Note: the CI is 99%
the level of significance is used for hypothesis testing, which isn't applicable here.
