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=

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

Predicting Upvotes and Downvotes in Location-Based Social Networks Using Machine Learning

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

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

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

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

The scores in a certain math test are normally distributed with a mean of 80 and a standard deviation of 10. There 55 students and if the teacher decided to fail a

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

The temperature during June is normally distributed with mean of 68 degrees and standard deviation 6 degrees. What is the probability that the temperature is between 70 and 80 degrees? - Quora

If a normal distribution has a mean of 65 and a standard deviation of 8, what score bounds the 19.8% below the mean? - Quora