Fry Brothers Heating and Air Conditioning Inc. employs Larry Clark and George Murnen to make service calls
Question:
Fry Brothers Heating and Air Conditioning Inc. employs Larry Clark and George Murnen to make service calls to repair furnaces and air-conditioning units in homes. Tom Fry, the owner, would like to know whether there is a difference in the mean number of service calls they make per day. A random sample of 40 days last year showed that Larry Clark made an average of 4.77 calls per day. For a sample of 50 days George Murnen made an average of 5.02 calls per day. Assume the population standard deviation for Larry Clark is 1.05 calls per day and 1.23 calls per day for George Murnen. At the .05 significance level, is there a difference in the mean number of calls per day between the two employees?
a. State the null and alternate hypotheses.
b. Compute the test statistic.
c. Compute the p-value.
d. What is your decision regarding the null hypothesis?
e. Interpret the result.
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