experiment

observational study

survey

simulation

experiment

observational study

parameter

statistic

Item 20

A study is performed to measure the effectiveness of a new drug for treating high blood pressure. In the treatment and control groups the blood pressure of the patient is measured. To conclude that the drug is effective, you need to analyze the following hypothesis: "The drug is not effective at lowering blood pressure." Which result allows you to conclude that the hypothesis is false after 200 resamplings of the data?

A.) The experimental difference of the means is -0.77, and, after resampling, the experimental difference falls outside the middle 90% of the resampling differences.

B.)The experimental difference of the means is 0.77, and, after resampling, the experimental difference falls outside the middle 90% of the resampling differences.

C.)The experimental difference of the means is -0.77, and, after resampling, the experimental difference falls within the middle 90% of the resampling differences.

D.)The experimental difference of the means is 0.77, and, after resampling, the experimental difference falls within the middle 90% of the resampling differences.