5. Suppose a set of math test scores is normally distributed with a mean of 100...
Math 100 test scores are normally distributed with a mean of 75 and a standard deviation of 7: a) Find the probability that a grade is between 65 and 80 b) Find the grade that is the 30th percentile
Assume math scores on the SAT are normally distributed with a mean of 500 and a standard deviation of 100. a. What is the probability that one randomly selected individual taking the sat will have a Math score of more than 530? b. What is the probability that one randomly selected individual taking the SAT will have a Math score between 450 and 600?c. Find the 60th percentile of these scores.
IV. Assume that IQ scores are normally distributed, with a mean of 100 and standard deviation of 15. What is the probability that a randomly selected person has an IQ score a greater than 120? b. less than 902 c. between 90 and 120? d. between 105 and 120?
Assume that scores on a math competition are normally distributed a mean of 12 points and a standard deviation of 2.5 points. Answer the following questions on these scores How many students scored less than 9 points? Round to the nearest percent. How many students scored at least 17 points? Round to the nearest percent. How many students have a score between 12 and 15 points? Round to the nearest percent. What is the cuttoff score for top 5% students....
2. Given a test that is normally distributed with a mean of 100 and a standard deviation of 12, find: (a) the probability that a single score drawn at random will be greater than 110 (relevant section) (b) the probability that a sample of 25 scores will have a mean greater than 105 (relevant section) (c) the probability that a sample of 64 scores will have a mean greater than 105 (relevant section) (d) the probability that the mean of...
8. Suppose the scores of students on an exam are normally distributed with mean u = 17.6 and standard deviation o = 4.9. (a) Determine the distribution of the sample mean score for a randomly selected sample of 36 students who took the exam. (b) Find the probability that the sample mean score will be less than 20 for a sample of 36 randomly selected students. (c) How large a sample size would be required to ensure that the probability...
suppose the test scores of a history class with 120 students are normally distributed with a mean of 78 and a standard deviation of 6 what is the probalitiy that a random student got below a 70? show work clearly b) what is the probability that if 9 kids are selected randomly their mean score is below a 70? c) is your answer to part b based on pop distribution, the distribution of a sample, or a sanple distribution?? explain...
Stanford–Binet IQ Test scores are normally distributed with a mean score of 100 and a standard deviation of 15. (10 points) Sketch the distribution of Stanford–Binet IQ test scores. Write the equation that gives the z score corresponding to a Stanford–Binet IQ test score. Sketch the distribution of such z scores. Find the probability that a randomly selected person has an IQ test score Over 145. Under 91.
assume that adults have it scores that are normally distributed with a mean of 100 Time Limit: 02.00.00 mathal.com/Student/Playe Triola, Statistics 13e This Test: 63 pts possible 15 of 50 (11 complete) Test: Test-3-CH-06-07 This Question: 1 pt Assume that adults have 10 scores that are normally distributed with a mean of p = 100 and a standard deviation a = 15. Find the probability that a randomly selected adult has an 10 between 86 and 114 Click to view_page_1...
Test scores on a certain test are normally distributed with a mean of 25 and a standard deviation of 5. Find the probability that the mean of a sample of 30 tests is between 27.6 and 32.4. Group of answer choices 0.2222 0.0022 0.9306 0.2321