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 data,the lower limit for the difference between population means is 0.15 hours.
Definitions:
Market Demand
The total quantity of a good or service that all consumers are willing and able to purchase at various prices during a given period.
Nondiscriminating Pure Monopolist
A monopolist who sells their product at the same price to every customer, not charging different prices to different buyers.
Industry Demand Curve
A graph showing the relationship between the price of a good and the total amount of the good all consumers are willing to purchase within a specific industry.
Welfare or Efficiency Loss
The decrease in economic efficiency, often measured as the loss of consumer or producer surplus, due to deviations from perfect competition.
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