anonymous
  • anonymous
The grades on the last math exam had a mean of 72%. Assume the population of grades on math exams is known to be distributed normally, with a standard deviation of 5%. Approximately what percent of students earn a score between 72% and 87%? 49.9% 1% 50% 47.7%
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
anonymous
  • anonymous
basic stats problem... need an idea of how much you understand first, so I'll ask a preliminary question.... How many standard deviations from 72 is 87? (remember, the standard deviation is 5)

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