Question: The standard deviation on your last test was 10. The average was a 70. The distribution had a normal shape (symmetrical with only one hump).

The standard deviation on your last test was 10. The average was a 70. The distribution had a normal shape (symmetrical with only one hump). Half of the people scored 70 or below. What percentage of your class scored between 60 and 80? (Please note that this is one standard deviation above and below the mean.)

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