Refer to the diagram, which shows three demand curves for coffee.Which of the following would cause the change in the demand for coffee illustrated by the shift from D1 to D2? 
Definitions:
Standard Deviation
A statistical tool that measures the extent of variation or scattering of values in a dataset, pointing out how much the data varies from the mean.
Normal Population
A statistical population that follows a normal distribution, characterized by its bell-shaped curve where most observations cluster around the central peak and the probabilities for values to occur are symmetrically distributed around the mean.
Mean Age
The average age calculated by adding all the ages together and dividing by the number of individuals.
Heights of Men
This term could refer to a study or data collection focusing on measuring and analyzing the heights of male individuals.
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