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Scores on a university exam are Normally distributed with a mean of 68 and a standard deviation of 9. Using the 68-95-99.7 rule, what percentage of students score above 77? A. 2.5% B. 5% C. 16% D. 32%
asked
Oct 23, 2017
Mathematics
high-school
2
answers
5
votes
189k
views
The clearing of land to produce cotton in the Mali empire resulted in what ?
asked
Mar 16, 2017
History
middle-school
1
answer
5
votes
39.6k
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