A Professor Was Curious About Her Students' Grade Point Averages $3.01 \pm 2.977 ( 0.534 / \sqrt { 15 } )$

question 68

Multiple Choice

A professor was curious about her students' grade point averages (GPAs) . She took a random
Sample of 15 students and found a mean GPA of 3.01 with a standard deviation of 0.534. Which of
The following formulas gives a 99% confidence interval for the mean GPA of the professor's
Students?

• A) \(3.01 \pm 2.977 ( 0.534 / \sqrt { 15 } )\)
• B) \(3.01 \pm 2.576 ( 0.534 / \sqrt { 15 } )\)
• C) \(3.01 \pm 2.977 ( 0.534 / \sqrt { 14 } )\)
• D) \(3.01 \pm 2.947 ( 0.534 / \sqrt { 15 } )\)
• E) \(3.01 \pm 2.947 ( 0.534 / \sqrt { 14 } )\)

---

Definitions:

Inventory

The raw materials, work-in-process products, and finished goods that are considered to be the portion of a business's assets that are ready or will be ready for sale.

Interest-Bearing Note

A debt instrument that pays interest to the holder until the maturity date, at which point the principal is repaid.

Interest

The cost of borrowing money or the return earned on an investment, typically expressed as a percentage.