11) Mean = = 45
Standard deviation = = 9
We have given P(X < x) = 0.97
z value 0.97 is 1.88 ( Using z table)
We have to find the value of x
61.92 separates the top 3% from the bottom 97%.
11) Suppose the mean test score is 45 with a standard deviation of 9. What is...
Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11 7 Find P81 , which separates the bottom 81% from the top 19%, Round to two decimal places. O A. 66.60 O B. 0.29 ОС. 088 O D. 73.47 Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11 7 Find P81 , which separates the bottom 81% from the top 19%, Round to...
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
suppose the mean of a data set is 68.9 and the standard deviation is 1. find P81, which separates the bottom 81 from the top 19
15) Assume that z scores are normally distributed with a mean of 0 and a standard deviation 15) of 1. If P(z> c) 0.109, find c. olve the problem. 16) 16) Scores on an English test are normally distributed with a mean of 37.4 and a standard deviation of 7.9. Find the score that separates the top 59% from the bottom 41% 17) Suppose that replacement times for washing machines are normally distributed with a 17) mean of 10.9 years...
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?
Scores on a test are normally distributed with a mean of 63.2 and a standard deviation of 11.7. Find P81, which separates the bottom 81% from the top 19%. Round to two decimal places. A. 0.88 B. 73.47 C. 66.60 D. 0.29
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?
Test A earned a Mean of 18, standard Deviation of 1.7 and my score was 20 Test B earned a Mean of 45, standard Deviation of 4.2 and my score was 50. Which results were better? I need help understanding the procedure to find the answer.
Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation of 1.1 years. Find the replacement time that separates the top 3% from the bottom 97% . Round your answer to 3 decimal places.