SOLUTION: A food snack manufacturer samples 9 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 10.4 and the sample standard deviation is 0.15, find th

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Question 1039847: A food snack manufacturer samples 9 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 10.4 and the sample standard deviation is 0.15, find the 95% confidence interval of the true mean.
A.
(10.30, 10.50)
B.
(10.05, 10.75)
C.
(10.35, 10.45)
D.
(10.28, 10.52)
Answer by robertb(5830) About Me  (Show Source):
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D. (10.28, 10.52)
(10.4+-+2.306%2A%280.15%2Fsqrt%289%29%29, 10.4+%2B+2.306%2A%280.15%2Fsqrt%289%29%29)
=(10.2847, 10.5153).