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In order to test the effectiveness of a drug called XZR designed to reduce cholesterol levels, 9 heart patients' cholesterol levels are measured...
In order to test the effectiveness of a drug called XZR designed to reduce cholesterol levels, 9 heart patients' cholesterol levels are measured before they are given the drug. The same 9 patients use XZR for two continuous months. After two months of continuous use, the 9 patients' cholesterol levels are measured again. Based on this observation, what kind of test do you need to perform in Excel?
Z-test: two sample for means
t-test: two samples assuming equal variance
t-test: two samples assuming unequal variance
t-test: paired two samples for means
