Use the figure below to answer the following questions. 
Figure 5.2.1
-Consider Figure 5.2.1.If the price is $4,what is the consumer surplus from the third unit of the good?
Definitions:
Chi-squared Test
A statistical test used to determine whether there is a significant association between categorical variables.
Two-tailed Test
A statistical test in which the critical area of a distribution is two-sided and tests whether a sample is either greater than or less than a certain range of values.
Chi-squared Goodness-of-fit
A statistical test used to determine if a sample data fits a distribution from a certain population, based on the differences between observed and expected frequencies.
Two-tail Test
A statistical test that considers the possibility of observing extreme outcomes in both tails of the distribution.
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