(See Steps) A company claims that people using its sleeping pill will sleep for at least 8 hours a night. (a) Use the following sample to test at = .05.
Question: A company claims that people using its sleeping pill will sleep for at least 8 hours a night. (a) Use the following sample to test at = .05. (b) suppose no claim was made but the company is thinking of making a claim using a 95% two-sided confidence interval. Construct the interval using the same data and suggest the maximum claim the company can make.
n=144
\(\bar{X} = 7.5\) hours
s = 1.8 hours
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