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

If you need immediate math help from PAID TUTORS right now, click here. (paid link)
Click here to see ALL problems on Probability-and-statistics

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(48516) (Show Source):
You can put this solution on YOUR website!
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?
-----------------
test statistic = t
Assuming a 2-tail test with alpha = 5% you get:
ts = 2.064[3/5] = 1.2384
==============================
Cheers,
Stan H.