SAT verbal scores are normally distributed with a mean of 430 and a standard deviation of 120 (based on data from the College Board ATP) Randomly selected SAT verbal scores are obtained from the population of students who took a test preparatory course from a training school Assume that this training course has no effect on test scores a If one of the students is randomly selected, find the probability that he or she obtained a score greater than 440 b If 100 students of an SAT preparation course achieve a sample mean of 440, does it seem reasonable to conclude that the course is effective because the students perform better on the SAT

Question

SAT verbal scores are normally distributed with a mean of 430 and a standard deviation of 120 (based on data from the College Board ATP)  Randomly selected SAT verbal scores are obtained from the population of students who took a test preparatory course from a training school  Assume that this training course has no effect on test scores  a  If one of the students is randomly selected, find the probability that he or she obtained a score greater than 440  b  If 100 students of an SAT preparation course achieve a sample mean of 440, does it seem reasonable to conclude that the course is effective because the students perform better on the SAT

SolutionInn · Accepted Answer

a Normal distribution 430 120 Px 440 Pz 08 5000 0319 4681 b Normal distr...

SAT verbal scores are normally distributed with a mean of 430 and a standard deviation of 120 (based on data from the College Board ATP).

Step by Step Solution

Step: 1

Step: 2Unlock detailed examples and clear explanations to master concepts

Step: 3Unlock to practice, ask and learn with real-world examples

Document Format ( 1 attachment)

789-S-J-P-D (1476).docx

Claim Your Hoodie Now!

Recommended Textbook for

Study Smart with AI Flashcards