00:01
For this problem, we are told that in a study to determine whether counseling could help people lose weight, sample of people experienced group -based behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months.
00:13
The following data are the numbers of pounds lost for five people.
00:16
We're then told that it is reasonable to assume that the population is approximately normal.
00:22
We're told that a researcher wants to know whether the mean weight loss is greater than 10 pounds, and we're asked to compute the p value of the test.
00:29
So in this case, because we have such a small sample size, we'll want to use the t statistic, where our t value is going to be x bar minus the null hypothesized mean value divided by the sample standard deviation over the square root of n.
00:51
So in this case, x bar is 10 .554.
00:55
So we have 10 .554.
00:59
Let me just do this here.
01:01
10 .554 minus 10.
01:04
Divided by 6 .74756.
01:07
That's our standard deviation of the data...