Consider the following hypotheses test.
H0: ?? 80Ha: ?< 80
?
A sample of 121 provided a sample mean of 77.3. The population standard deviation is known to be 16.5.
a.
Compute the value of the test statistic.b.
Determine the p-value; and using ? = .063, test the above hypotheses.c.
Using the critical value approach and ? = .063, test the hypotheses.
What will be an ideal response?
| a. | z = -1.8 |
| b. | p-value = .0359 < .063, reject H0 |
| c. | test statistic z = -1.8 |
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