Refer to Exercise 77. a. Construct and interpret a 95% confidence interval for the true hardness
Question:
Refer to Exercise 77.
a. Construct and interpret a 95% confidence interval for the true hardness μ of the tablets in this batch. Assume that the conditions for inference are met.
b. Explain why the interval in part (a) is consistent with the result of the test in Exercise 77.
Exercise 77.
A drug manufacturer forms tablets by compressing a granular material that contains the active ingredient and various fillers. The hardness of a sample from each batch of tablets produced is measured to control the compression process. The target value for the hardness is μ = 11.5. The hardness data for a random sample of 20 tablets from one large batch are
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