What fraction score lies between 80 and 90, if the normal distribution mean is 70 and the standard deviation is 10? - Quora

Answer (1 of 3): Convert 80 and 90 to z-scores and look up the z-scores in the Normal Distribution table in the back of your textbook. You want the area between them, so you will need to subtract the area between z=0 and the z score you get from converting 80 to a z-score from the area between z=

If a normally distributed group of test scores has a mean of 70 and a standard deviation of 12, then what is the percentage of scores that will fall below 50? - Quora

If a test is normally distributed with a mean of 90 and a standard deviation of 10, what proportion of the scores is above 110 and below 85? - Quora

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On a test, mean score was 70 and the standard deviation of the scores was 15. If there were 1000 test takers, how many people scored between 60 and 75? - Quora

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On a test, if the mean score is 60 and the standard deviation is 10, what percentage of scores is 50 and above? - Quora

If a normally distributed group of test scores has a mean of 70 and a standard deviation of 12, then what is the percentage of scores that will fall below 50? - Quora

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The mean of a set of normally distributed test scores is 70 with a standard deviation of 8. What percent of the scores lie between 80 and 90? Answer to the nearest

A set of data has a normal distribution with a mean on 51 and a standard deviation of 7. What is the percent of data within the following interval: 30 - 72? - Quora

The mean of a set of normally distributed test scores is 70 with a standard deviation of 8. What percent of the scores lie between 80 and 90? Answer to the nearest

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What is the probability (as a decimal value) that a student that got an 80 on an exam with a standard deviation of 12 and mean exam score of 70 scored less

If test scores are normally distributed with a mean of 80 and a standard deviation of 10, what is the probability that a student scored 76? - Quora