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 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

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

For a normal distribution with mean of 70 and standard deviation of 10 what is the minimum score necessary to be the top 60% of the distribution? - Quora

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

SOLVED: Scores on an exam are normally distributed with a mean of 65 and at standard deviation of 9. Find the percentage of scores: a) Less than 54 b) At least 80

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Tina's score on her midterm exam was at the 50th percentile. The grades were normally distributed. The exam average was 59 and the standard deviation was 1.4. What was Tina's score on

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Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. What percentage of scores is less than 140?

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