8.Construct a 95% confidence interval on the mean reaction pressure, when the hypothesis is Ho =...
8.Construct a 95% confidence interval on the mean reaction pressure, when the hypothesis is Ho = 225,
Ha >225 if the sample mean is y = 241.5, sample variance S2 = 9747, the sample size n = 16 and α= 0.05?
Homework Answers
t critical value at 0.05 level with 15 df = 2.131
95% confidence interval for 
is
- t * S /
sqrt(n) < < + t * S /
sqrt(n)
241.5 - 2.131 * sqrt(9747) / sqrt(16) < < 241.5 + 2.131
* sqrt(9747) / sqrt(16)
188.9032 < < 294.0968
95% CI is (188.9032 , 294.0968)
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