Homework Help: Statistics

Posted by Zac on Monday, March 5, 2012 at 2:01pm.

5. Scores on a recent national statistics exam were normally distributed with a mean of 80 and a standard deviation of 6.

a. What is the probability that a randomly selected exam will have a score of at least 71?
b. What percentage of exams will have scores between 89 and 92?
c. If the top 2.5% of test scores receive merit awards, what is the lowest score eligible for an award?
d. If there were 334 exams with scores of at least 89, how many students took the exam?

No one has answered this question yet.

Answer this Question

Related Questions

statistics - Scores on a recent national statistics exam were normally ...
Analytical Skills - If your score on a statistics exam was 76 and the professor ...
statistics - A math professor notices that scores from a recent exam are ...
statistics - Assume that a set of test scores is normally distributed with a ...
statistics - Scores on the ACT college entrance exam are Normally distributed ...
statistics - In a psychology class of 100 students, test scores are normally ...
Statistics - A math professor notices that scores from a recent exam are ...
statistics - A final exam in Math 157 is normally distributed and has a mean of ...
statistics - The scores on a national achievement test are normally distributed ...
business statistics - Your statistics instructor wants you to determine a ...

For Further Reading

First Name:
School Subject:
Answer: