A Group of Statistics Students Decided to Conduct a Survey

question 75

Multiple Choice

A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spend studying per week. Based on a simple random sample, they surveyed 144 students. The statistics showed that students studied an average of 20 hours per week with a standard deviation of 10 hours. What is the probability that average student study time is between 18 and 22 hours?

• A) 0.9640
• B) 0.0160
• C) 0.0360
• D) 0.9836

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Definitions:

Strong-Form Efficient

A state of market efficiency where all information, public and private, is accounted for in stock prices.

SML

Security Market Line, a graphical representation that shows the expected return of a security or portfolio as a function of its beta (systematic risk).

Expected Total Return

The sum of income and capital appreciation that an investment is anticipated to earn over a specific period.

Constant

A value that remains unchanged throughout the course of a calculation or process.