Question 457500
# 5 


Hint: The two data sets are NOT independent since the two data sets are derived from the same 7 patients. So in a way, the "after" data is in some way related to the "before" data.



So you CANNOT use either a two sample z or t test because those tests use the basic assumption that the two samples should be independent.



So you have to use the paired t-test.


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# 6


Use the test statistic found in #5 and tables found in your book or on the web to find the area under the T distribution curve (with degrees of freedom = n - 1 = 7 - 1 = 6) from the T test statistic onward to the right (note: this is a right tailed test)


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# 7


This is very similar to #5 but you use a 0.01 significance level instead of a 0.05 significance level.