1. A researcher wants to determine whether or not a given drug has any effect on the scores of human subjects performing a task of ESP sensitivity. He randomly assigns his subjects to one of two groups. Nine hundred subjects in group 1 (the experimental group) receive an oral administration of the drug prior to testing. In contrast, 1000 subjects in group 2 (control group) receive a placebo.

For the drug group, the mean score on the ESP sensitivity test was 9.78, SD = 4.05, n = 900

For the non-drug group, the mean is 15.10, SD=4.28, n=1000

Hypothesis Testing

use the steps

Example and Formulas

QUANTITATIVE DATA TESTING: TESTING THE MEAN TESTING A CLAIM or comparing a sample with a certain value. This value can either be a parameter (population data) or another sample value with incomplete data. Testing A Claim About a Mean (When n>30 or n