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=

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

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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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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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Given a mean of 70 and a standard deviation of 10, what is the area between 60 and 90 in a graph? Use the 0.6826 - 0.9544 - 0.9972 rule.

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

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