SOLUTION: a preliminary study of hourly wages paid to unskilled employees in three metropolitian areas was conducted. seven employees were included from area a, 9 from area b and 12 from are

Question 251655: a preliminary study of hourly wages paid to unskilled employees in three metropolitian areas was conducted. seven employees were included from area a, 9 from area b and 12 from area c. the test statistic was computed to be 4.91. What can we conclude at the .05 level?
a. mean hourly wages of unskilled employees all areas are equal
b. mean hourly wages in at least 2 metropolitian areas are different
c. more degrees of freedom are needed
d. none of these are correct
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A preliminary study of hourly wages paid to unskilled employees in three metropolitian areas was conducted.
seven employees were included from area a,
9 from area b and
12 from area c.
-----
the test statistic was computed to be 4.91.
What can we conclude at the .05 level?
----------
Determine the degrees of freedom of the test.
c = number of categories = 3
n = number of subjects = 28
---
Then F(sub c-1,n-c) = F(2,25) = ?
In F-chart df = 2 for numerator; df= 25 for denominator.
F-chart value for right-tail test with alpha = 5% is 3.39
----
Conclusion: Since the test stat is greater than the critical value
reject Ho.
Answer: b
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Cheers,
Stan H.
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a. mean hourly wages of unskilled employees all areas are equal
b. mean hourly wages in at least 2 metropolitian areas are different
c. more degrees of freedom are needed
d. none of these are correct

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