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?

statistic  Anonymous, Tuesday, October 18, 2016 at 2:18pm
+33
Answer This Question
Related Questions
 statistics ***pls help!  for each of the following, assume the 2 samples are ...
 phoenix  Each sample has n= 5 scores with s2 =38 for the first sample and s2 = ...
 bus stats  Given the following information about a hypothesis test of the ...
 statistics  Select the TWO options that are TRUE statements about twosample t...
 statistics  Select the TWO options that are TRUE statements about twosample t...
 Statistics  Find the 99% confidence interval for the difference between two ...
 Statistics  Find the 99% confidence interval for the difference between two ...
 math  Find the 95% confidence interval for the difference between two means ...
 math check  Find the 95% confidence interval for the difference between two ...
 statistics  1)Please Help In testing whether the means of two normal ...
More Related Questions