Use the following to answer questions :
Figure: Demand and Supply of Shirts 
-(Figure: Demand and Supply of Shirts) Look at the figure Demand and Supply of Shirts. In the graph, if the line labeled D shows how many shirts per week will be demanded at various prices, then it is clear that as the price of shirts falls:
Definitions:
Confidence Interval
A range of values, derived from sample data, that is likely to contain the value of an unknown population parameter with a certain level of confidence.
Smoking Rates
The percentage of individuals in a population who smoke tobacco products.
Confidence Interval
An ensemble of values, from statistical analysis of samples, believed likely to encircle the value of a clandestine population parameter.
Female Students
A demographic category referring to students identified as female.
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