The Following Is a List of GPA Ranges and Frequencies

question 85

Essay

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. (See the Excel Data File.)
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 GPAs between 1.5 and 3.9? Does this make sense given what you know about GPAs?

• 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 GPAs between 1.5 and 3.9? Does this make sense given what you know about GPAs?

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Definitions:

Expected Income

The amount of income an individual anticipates or forecasts to receive over a certain period.

Probability

A numeric evaluation representing the probability of an event taking place, where 0 signifies no chance and 1 signifies certainty.

Expected Income

The weighted average of all possible income outcomes, where the weights are the probabilities of each outcome occurring.

Probability

A measure of the likelihood of a particular event or outcome, expressed as a number between 0 and 1, where 0 indicates impossibility and 1 indicates certainty.