Description of Statistics - Hypothesis Testing
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1. Consider the following hypothesis test:
Ho: u</= 12
Ha: u>12
A sample of 25 provided a sample mean x=14 and a sample standard deviation s = 4.32
a. Compute the test statistic.
b. Use the t distribution table to compute a range for the p value
c. At alpha= 0.05, what is the conclusion.
d. What is the rejection rule using the critical value? What is the conclusion?
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Solution Summary
The solution illustrates a testing of hypothesis problem using t-test. Step-wise solution is provided.
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(a) t = (x - mu)/(s/sqrt n) = (14 - 12)/(4.32/sqrt 25) = 2.3148
(b) The upper-tailed p- value ...
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