SOLUTION: A sample of 25 households in Prolific City revealed a mean of 7.5 residing members and a standard deviation of 3. If the mean household size for the nation is 4.2, what is the valu

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Question 138548: A sample of 25 households in Prolific City revealed a mean of 7.5 residing members and a standard deviation of 3. If the mean household size for the nation is 4.2, what is the value of the test statistic?

a. 27.5
b. 5.5
c. 1.1
d. 0.55
Answer by stanbon(75887) About Me  (Show Source):
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A sample of 25 households in Prolific City revealed a mean of 7.5 residing members and a standard deviation of 3. If the mean household size for the nation is 4.2, what is the value of the test statistic?
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test statistic = t
Assuming a 2-tail test with alpha = 5% you get:
ts = 2.064[3/5] = 1.2384
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Cheers,
Stan H.