Suppose the mean score on a physics test was 65 and the standard deviation is 6. Wanda is hoping she made at least an 8. What score should Wanda have made in order to get her 8?
Suppose the mean score on a physics test was 65 and the standard deviation is 6....
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.
The mean score of a competency test is 65, with a standard deviation of 10. Use the Empirical Rule to find the percentage of scores between 55 and 75. (Assume the data set has a bell-shaped distribution.)
11) Suppose the mean test score is 45 with a standard deviation of 9. What is the score which separates the top 3% from the bottom 97%?
QUESTION 6 The mean IQ score of all adults is 100, with a standard deviation of 15. Find the percentage of adults with scores between 70 and 130. Assume the data has a bell-shaped distribution. State the answer only and no additional work. Do not state the percent sign and state as a whole number. (Example: do not state 13% or 0.13. Instead state the answer as 13) QUESTION 4 2 po Many firms use on-the-job training to teach their...
Suppose scores of students on a test are approximately normally distributed with a mean score of 65 points and a standard deviation of 8 points. It is decided to give A's to 10 percent of the students. Obtain the threshold score that will result in an A.
Scores on a test are normally distributed with a mean of 65 and a standard deviation of 10. Find the score to the nearest whole number which separates the bottom 81% from the top 19%. A. 88 B. 68 C. 56 D 74
assume that the mean of a distribution of test score is 400, with a standard deviation of 45. What would be the value of the score that falls two standard deviations above the mean?
assume that the mean of a distribution of test score is 400, with a standard deviation of 45. What would be the value of the score that falls two standard deviations above the mean?
A test of reading ability has mean 60 and standard deviation 5 when given to third graders. Sixth graders have mean score 83 and standard deviation 11 on the same test. To provide separate "norms" for each grade, we want scores in each grade to have mean 100 and standard deviation 20. (Round your answers to two decimal places.) (a) What linear transformation will change third-grade scores x into new scores xnew = a + bx that have the desired...
Suppose that the scores on a reading ability test are normally distributed with a mean of 65 and a standard deviation of 10 . What proportion of individuals score at least 55 points on this test? Round your answer to at least four decimal places.