The NCAA is interested in estimating the difference in mean number of daily training hours for men and women athletes on college campuses. It wants 95 percent confidence and will select a sample of 10 men and 10 women for the study. The variances are assumed equal and the populations normally distributed. The sample results are: 
Based on these sample data, the estimate for the standard deviation of the sampling distribution is found by taking the square root of the sum of the two sample variances.
Definitions:
Potent Stimulant
A substance that dramatically increases alertness, attention, and energy by stimulating the central nervous system.
Dangerous Stimulant
A substance that raises levels of physiological or nervous activity in the body, potentially posing health risks.
Role-Playing View
The perspective that suggests individuals learn and adapt their behavior based on the expectations and norms of the roles they adopt in society.
Theodore Barber
A psychologist known for his work on hypnosis, suggestibility, and the placebo effect.
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