Let X Represent the SAT Total Score of an Entering

question 52

Multiple Choice

Let X represent the SAT total score of an entering freshman at University X.The random variable X is known to have a N(1200,90) distribution.Let Y represent the SAT total score of an entering freshman at University Y.The random variable Y is known to have a N(1215,110) distribution.A random sample of 100 freshmen is obtained from each university.Let = the sample mean of the 100 scores from University X,and = the sample mean of the 100 scores from University Y.What is the distribution of the difference in sample means between University X and University Y: - ?

• A)N(-15,-20)
• B)N(-15,14.2)
• C)N(-15,142.1)
• D)N(-15,200)

---

Definitions:

Productivity

A measure of the efficiency of production, often calculated as the ratio of output to inputs in the production process.

Standard of Living

The amount of riches, ease, physical items, and basic requirements possessed by a distinct class or region.

Productivity

The measurement of the efficiency of production, often evaluated as the ratio of output to inputs in the production process.

Human Capital

The economic value of a worker's experience and skills, including education, training, intelligence, skills, health, and other things employers value.