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Home Q & A Board Science-Related Homework Help Mathematics
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Stevbo Stevbo
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7 years ago
A food snack manufacturer samples 15 bags of pretzels off the assembly line and weighed their contents. If the sample mean is 10.0 and the sample standard deviation is 0.15, find the 95% confidence interval estimate for the true mean.

  A.(9.96, 10.04)

  B.(9.68, 10.32)

  C.(9.97, 10.80)

  D.(9.92, 10.08)
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#1
Educator
7 years ago
a=0.05, |t(0.025,df=n-1=14)|=2.14 (check student t table)
So 95% CI is
xbar±t*s/√n

Rightwards Arrow 10.2± 2.14*0.25/sqrt(15)

Rightwards Arrow (10.06186, 10.33814)

(10.06, 10.34)

Pick B
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