The following is a list of GPA ranges and frequencies from a high school.Use 1.5 as the midpoint of the 2.0 or less category. 
a.What is the mean GPA?
B)What is the sample standard deviation of the GPA
C)Assuming the distribution is bell shaped what percentage of the students would have GPA's between 1.5 and 3.9? Does this make sense given what you know about GPA's?
Definitions:
Discount Factor
A multiplier used in discounted cash flow analysis to calculate the present value of future cash flows, reflecting the time value of money.
Discount Rate
The interest rate used to discount future cash flows to their present value, often in the context of evaluating investments or loan decisions.
Net Present Value
A calculation used to assess the profitability of an investment, considering the present value of its cash flows and initial cost.
Discount Rate
In discounted cash flow analysis, the discount rate is the interest rate utilized to ascertain the present value of future cash flows.
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