Enter a number rounded to one decimal if necessary. The scores of this test are normally...
t Enter a number rounded to one decimal if necessary. The scores of this test are normally distributed with a mean of 81 and a standard deviation of 6. Then A/ percent of the students scored 75 or lower, percent of the students scored between 75 and 87, and 18 A percent of the students scored 81 or higher.
A set of 1100 exam scores is normally distributed with a mean = 84 and standard deviation = 4. Use the Empirical Rule to complete the statements below. How many students scored higher than 84? How many students scored between 80 and 88? How many students scored between 76 and 92? How many students scored between 84 and 88? How many students scored lower than 80? How many students scored lower than 88?
Scores of 281 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O 15 O 14 Not enough information to answer the question None of the given numerical values is correct 10
Scores of 239 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 9 Not enough information to answer the question 12 6 2 3 13 None of the given numerical values is correct
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 79 and the standard deviation was 8. 55,63,71,79,87,95,103 Distribution of Test Scores What is the approximate percentage of students who scored between 79 and 103 on the test? % What is the approximate percentage of students who scored lower than 55 on the test? % What is the approximate percentage of students who...
Question 14 2 pt Scores of 166 students on an exam were normally distributed with the mean 79 and the standard deviation of 6. Using the "68-95-99.7" rule, estimate how many students score above 91 O1 o O 8 O2 O 6 Not enough information to answ nswer the question None of the given numerical values is correct
In a recently administered IQ test, the scores were distributed normally, with mean 100 and standard deviation 15. What proportion of the test takers scored between 70 and 130? A. About 68%; B. About 84% C. About 95% D. About 99.5%
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 140, while the mean score was 79 and the standard deviation was 15. 34 49 64 79 94 109 124 Distribution of Test Scores What is the approximate percentage students who scored between 64 and 94 on the test? What is the approximate percentage of students who scored lower than 34 on the test? What is the approximate percentage...
Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 25. Use the 68-95-99.7 rule to find the following quantities.
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.)