1. The scores on a nationwide aptitude test are normally distributed, with a mean of 80 and a
standard deviation of 12. (convert raw score to z score)
a. What percentage of aptitude scores are below a score of 65?
1. The scores on a nationwide aptitude test are normally distributed, with a mean of 80...
6. In 2007 the scores on the College Aptitude Test (C. A.T.) were distributed normally with mean 500 and standard deviation 60, briefly N (500, 60). Find the 75th percentile for the CAT. 520.0000 605.4431 458.1174 540.4694 D7 In 2007 the scores on the College Aptitude Test (C. A.T.) were distributed normally with mean 500 and standard deviation 60, briefly N (500, 60). Find the Z score for a CAT score of 450. -.5631 -.8333 .6733 1.0833
Suppose that the scores on a mathem atics aptitude test are normally distributed. If the test results have a mean score of 84 points and a standard deviation of 10.2 points, w hat is the probability that a student from this population scored 89 points or higher on this particular test? (Hint: first compute the Z score.)
Scores on a standard test of mechanical aptitude are normally distributed with a mean of 72 and a s. d. of 12. If 36 subjects are randomly selected, the probability that their mean score will be at least 69 is (round to the 3rd decimal place).
5. (20 pts) Suppose that the scores on a mathematics aptitude test are normally distributed. If the test results have a mean score of 84 points and a standard deviation of 10.2 points, what is the probability that a student from this population scored 89 points or higher on this particular test? (Hint: first compute e Z-score.)
Scores on a certain test were normally distributed with a mean of 80 and a standard deviation of ± 12. What is the probability that a given student got a score more than 80? Your answer should be correct to four decimal places.
The scores on a lab test are normally distributed with mean of 200. If the standard deviation is 20, find: a) The score that is 2 standard deviations below the mean b) The percentage of scores that fall between 180 and 240 c) The percentage of scores above 240 d) The percentage of scores between 200 and 260 e) The percentage of scores below 140
4. National SAT (Scholastic Aptitude Test) scores for high school students in the U.S.A. are normally distributed with a mean of 500 and a standard deviation of 116. What is the percentage of students that score (a) above 700? (C) between 650 and 800? (b) under 400? (d) within 50 of the mean?
the scores on a certain test are normally distributed with a mean score of 65 and a standard deviation of 2. what is the probability that a sample of 90 students will have a mean score of at least 65.2108.
1. 2. Scores for a common standardized college aptitude test are normally distributed with a mean of 485 and a standard deviation of 114. Randomly selected men are given a Test Prepartion Course before taking this test. Assume, for sake of argument, that the test has no effect. If 1 of the men is randomly selected, find the probability that his score is at least 536. P(X> 536) = Round to 4 decimal places. If 20 of the men are...
Question 12 6 pts The scores on a certain test are normally distributed with a mean score of 65 and a standard deviation of 2. What is the probability that a sample of 90 students will have a mean score of at least 65.2108? 0.1587 0.3174 0.3413 0.8413