Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

Scores for a common standardized college aptitude test are normally distributed with a mean of 486 and a standard deviation of 106. Randomly selected

Scores for a common standardized college aptitude test are normally distributed with a mean of 486 and a standard deviation of 106. Randomly selected students are given a Test Preparation Course before taking this test. Assume, for sake of argument, that the preparation course has no effect. If 1 student is randomly selected, find the probability that their score is at least 604.5. P(X > 604.5) = Enter your answer as a number accurate to 3 decmal places. If 5 students are randomly selected, find the probability that their mean score is at least 604.5. P(X > 604.5) = Enter your answer as a number accurate to 3 decimal places. Assume that any probability less than 5% is sufficient evidence to conclude that the preparation course does help students perform better on the test. If the random sample of 5 students does result in a mean score of 604.5, is there strong evidence to support the claim that the course is actually effective? O No. The probability indicates that it is possible by chance alone to randomly select a group of students with a mean as high as 604.5. O Yes. The probability indicates that it is (highly?) unlikely that by chance, a randomly selected group of students would get a mean as high as 604.5.

Step by Step Solution

3.43 Rating (156 Votes )

There are 3 Steps involved in it

Step: 1

In a set with mean 4 no of studentnand standard deviation o ... blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Statistical Reasoning for Everyday Life

Authors: Jeff Bennett, Bill Briggs, Mario F. Triola

4th edition

978-0321817747, 321817745, 978-0321890139, 321890132, 321817621, 978-0321817624

More Books

Students also viewed these Accounting questions