Homework Help: Stats

Posted by Jason L on Friday, February 23, 2007 at 4:33pm.

2 samples were collected to determine whether there was a difference between two weight loss methods targeting men. The average weight loss method is provided for the 2 samples along with the respective standard deviations. Is the second method - with an average weight loss of 23 pound better than its competitor (for = .10) Provide the test statistic and critical value.

Chart -
n Avg Stand Dev
27 18 6.4
29 23 8.2

You can probably use a 2-sample t-test on your data. Find the critical value using a t-table. Once you calculate the test statistic, compare the test statistic to the critical value. If the test statistic exceeds the critical value, you will reject the null and conclude a difference. If the test statistic does not exceed the critical value, you cannot reject the null.

I hope these few suggestions will help.

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