SOLUTION: The nine items of a sample had the following values: 45, 47, 50, 52, 46, 40, 49, 55, 66 Does the mean of the nine items differ significantly from an assumed normal population mea

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Question 1187211: The nine items of a sample had the following values:
45, 47, 50, 52, 46, 40, 49, 55, 66
Does the mean of the nine items differ significantly from an assumed normal population mean of 45 i.e.,   45 at   0.05?
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
the difference is a t-test with t(df=8, 0.975) = 2.306 assuming an alpha=0.05
x bar=48.89
s=5.06
t=difference in means/s/sqrt(n)
=3.89*sqrt(9)/5.06
=2.306
reject at the 5% level, p-value is 0.05005
the question says 0.05, and that is the above.