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the mean of normally distributed test scores is 80 and the standard division is 5. If there are 186 test scores in the data sample, how many of them were in the 75 to 80 range?

the mean of normally distributed test scores is 80 and the standard division is 5 If there are 186 test scores in the data sample how many of them were in the 7 class=

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Answer:

63

Step-by-step explanation:

score 75 is one standard dev below the mean ====>to the mean  encompasses approx 34% of scores

.34 * 186 = 63

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