On a test that has normal distribution of scores, a score of 58 falls two standard deviation below the mean, and a score of 85 is one standard deviation above the mean. What is the mean score of this test?

On a test that has a normal distribution of scores of 59 falls two standard deviations below the mean, and score of 74 is one standard deviation above the mean. If x is an integer score that lies between 2.5 and 3.0 standard deviations above the means. What is a possible value of x?

The class mean score on a test was 60, and the standard deviation was 15. If Elena's score was within 2 standard deviations of the mean, what is the lowest score she could have received?

Calculate the mean, variance and standard deviation for the following distribution.

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :

Calculate the mean and standard deviation of the distribution :