Do you need an answer to a question different from the above? Ask your question!

The number of students taking the Scholastic Aptitude Test (SAT) has risen to an all-time high of more than 1.5 million (College Board, August 26, 2008). Students are allowed to repeat the test in hopes of improving the score that is sent to college and university admission offices. The number of times the SAT was taken and the number of students are as follows.

Number of Number of

Times Students

1 ............ 721,769

2 ............ 601,325

3 ............ 166,736

4 ............ 22,299

5 ............ 6,730

a. Let x be a random variable indicating the number of times a student takes the SAT.

Show the probability distribution for this random variable.

b. What is the probability that a student takes the SAT more than one time?

c. What is the probability that a student takes the SAT three or more times?

d. What is the expected value of the number of times the SAT is taken? What is your interpretation of the expected value?

e. What is the variance and standard deviation for the number of times the SAT is taken?

Distribution

The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

Number of Number of

Times Students

1 ............ 721,769

2 ............ 601,325

3 ............ 166,736

4 ............ 22,299

5 ............ 6,730

a. Let x be a random variable indicating the number of times a student takes the SAT.

Show the probability distribution for this random variable.

b. What is the probability that a student takes the SAT more than one time?

c. What is the probability that a student takes the SAT three or more times?

d. What is the expected value of the number of times the SAT is taken? What is your interpretation of the expected value?

e. What is the variance and standard deviation for the number of times the SAT is taken?

Distribution

The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

11th Edition

Authors: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams

ISBN: 9780538481649