Question: A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the

A sample of 64 observations is selected from a normal population. The sample mean is 215, and the population standard deviation is 15. Conduct the following test of hypothesis using the 0.025 significance level.

H₀: 220

H₁: < 220

a. What is the decision rule?

b. What is the value of the test statistic?

c. What is thep-value?

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