Use the following to answer questions: 
-(Table: Externalities from Parks) The table Externalities from Parks shows the marginal social benefit and the marginal social cost of preserving various amounts of land in a city for a public park. At the socially optimum amount of land dedicated to the public park the marginal social benefit will be:
Definitions:
Confidence Interval
A range of values, derived from a data set, that is likely to contain the value of an unknown population parameter.
Confidence Interval
A range of values, derived from sample statistics, that is likely to contain the value of an unknown population parameter.
Confidence Interval
A range of values, derived from the sample statistics, that is likely to contain the value of an unknown population parameter.
Population Parameter
A numerical value summarizing the whole population, commonly used in statistics, such as the mean or standard deviation.
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