Find z score for the area under standard normal curve

Reference no: EM13122000

On Professor Grindstone's final exam the mean score was 78 and the standard deviation 10. He wants to "curve" the exam so that the middle 50% of the students get C's. (a) Find a z score for which the area under the standard normal curve from -z to z is 50%. (b) Find the range of scores which will be assigned a grade of C.

Reference no: EM13122000

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