The Time for a Professor to Grade a Homework in Statistics

question 54

Multiple Choice

The time for a professor to grade a homework in statistics is normally distributed with a mean of 12.6 minutes and a standard deviation of 2.5 minutes. What is the probability that randomly selected homework will require more than 12 minutes to grade?

• A) 0.8023
• B) 0.5948
• C) 0.6664
• D) 0.5040

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Definitions:

Spider

A nickname for SPDR (Standard & Poor's Depositary Receipts), a type of exchange-traded fund that mimics the performance of the S&P 500.

12b-1 Charges

Fees associated with mutual funds, charged annually for fund distribution and marketing costs, embedded in the fund's expense ratio.

Fund Assets

Financial resources under the control of an investment fund, including cash, securities, and other investments.

Sales Expenses

Costs incurred directly from the selling of goods or services, including things like commissions, advertising, and promotional materials.