Question

In: Statistics and Probability

A sample of 39 observations is selected from a normal population. The sample mean is 28,...

A sample of 39 observations is selected from a normal population. The sample mean is 28, and the population standard deviation is 4. Conduct the following test of hypothesis using the .05 significance level.

H₀ : μ ≤ 26

H₁ : μ > 26

(a)

Is this a one- or two-tailed test?

	"Two-tailed"-the alternate hypothesis is different from direction.
	"One-tailed"-the alternate hypothesis is greater than direction.

(b)

What is the decision rule? (Round your answer to 2 decimal places.)

(Click to select)Do not rejectReject H₀,when z >

(c)

What is the value of the test statistic? (Round your answer to 2 decimal places.)

Value of the test statistic

(d)

What is your decision regarding H₀?

	Do not reject
	Reject

There is (Click to select)sufficientinsufficient evidence to conclude that the population mean is greater than 26.

(e)

What is the p-value? (Round your answer to 4 decimal places.)

p-value

Expert Solution

a)

One-tailed"-the alternate hypothesis is greater than direction

b)

orchestra answered 3 years ago

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