We are interested in knowing if the following frequency distribution is normally distributed. The population mean and standard deviation of the data are 600 and 160, respectively. 
If the distribution was normally distributed, what is the probability that an observation would be a member of the "800 up to 1000" class?
Definitions:
Economic Profit
The difference between total revenue and total costs, including both explicit and implicit costs, representing the financial gain in conducting business activities.
Rate of Return
The increase or decrease in the value of an investment over a set time frame, shown as a percent of the investment's original price.
Assets
Economic resources owned or controlled by an individual, corporation, or country that are expected to provide future benefits, including cash, real estate, and intellectual property.
Equity Capital
Equity Capital is the amount of money that is invested in a company by its owners, in exchange for ownership interest in the company.
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