Mathematics, 21.03.2020 07:32 akheel4818
The number of students taking the 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 Times Number of 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 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?
Answers: 2
Mathematics, 21.06.2019 15:30, kmshacklette9879
What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angles. measure need asap
Answers: 1
Mathematics, 21.06.2019 16:20, lethycialee2427
Taking algebra two apex courses and need with these questions
Answers: 1
Mathematics, 21.06.2019 18:30, starlightmoon213
The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?
Answers: 3
The number of students taking the SAT has risen to an all-time high of more than 1.5 million (Colleg...
Mathematics, 26.08.2019 01:30
Mathematics, 26.08.2019 01:30
Mathematics, 26.08.2019 01:30
Chemistry, 26.08.2019 01:30
Mathematics, 26.08.2019 01:30
Mathematics, 26.08.2019 01:30
Business, 26.08.2019 01:30