Homework Help: statistic

Posted by Sharon on Sunday, November 11, 2012 at 8:25pm.

. For each of the following, assume that the two samples are selected from populations with equal means and calculate how much difference should be expected, on average, between the two sample means.
a. Each sample has n _ 5 scores with s2 _ 38 for the first sample and s2 _ 42 for the second. (Note: Because the two samples are the same size, the pooled variance is equal to the average of the two sample variances.)
b. Each sample has n _ 20 scores with s2 _ 38 for the first sample and s2 _ 42 for the second.
c. In part b, the two samples are bigger than in part a, but the variances are unchanged. How does sample size affect the size of the standard error for the sample mean difference?

No one has answered this question yet.

Answer this Question

Related Questions

statistics - 1)Please Help In testing whether the means of two normal ...
bus stats - Given the following information about a hypothesis test of the ...
statistics ***pls help! - for each of the following, assume the 2 samples are ...
business stats - Given the following information about a hypothesis test of the ...
binomial - Independent samples of n1 = 400 and n2= 400 observations were ...
stats multiple choice ? - A researcher reports that "Students were randomly...
stats multiple choice ? - A researcher reports that "Students were randomly...
Stats - If we are testing for the difference between the means of 2 independent ...
Statistics Hypothsis testing - Am I using the 2-sample T test or ANOVA? Please ...
Statistics - test the claim that μ1 = μ2 Two samples are ...

For Further Reading

First Name:
School Subject:
Answer: