A sample of 45 observations is selected from a normal population. The sample mea
ID: 3021469 • Letter: A
Question
A sample of 45 observations is selected from a normal population. The sample mean is 49, and the population standard deviation is 5. Conduct the following test of hypothesis using the 0.10 significance level.
H1: 51
What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
H0: = 51H1: 51
What is the value of the test statistic? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
Explanation / Answer
Z = [49 - 51 ] / [ 5 / srqt(45) ]
Z = -2 / 0.7454
Z = -2.683
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