The following probability distribution has been assessed for the number of accidents that occur in a Midwestern city each day: 
Based on this probability distribution,the standard deviation in the number of accidents per day is:
Definitions:
Consumption
Utilization of products and services by household members.
Present Value
The contemporary estimate of a future monetary sum or cash flows, evaluated with a given return rate.
Investment Projects
Initiatives or plans undertaken by individuals or organizations to allocate resources with the expectation of generating future profits.
Budget Set
The collection of all possible bundles of goods and services that a consumer can afford given their income and the prices of goods.
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