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A set of final examination grades in an introductory statistics course is normally distributed, with a...

A set of final examination grades in an introductory statistics course is normally distributed, with a mean of 70 and a standard deviation of 9.

  1. What is the probability that the student scored below 88 on this exam

  2. What is the probability that a student scored between 61 and 92.5

  3. The probability is 5% that a student taking the test scores higher than what grade

  4. If the professor grades on a curve --gives A’s to the top 10% of the class regardless of the score-- are you better off with a grade of 81 on this exam or a grade of 68 on a different exam. where the mean is 62 and the standard deviation is 3?   Answer using statistics.

Math   Statistics-And-Probability   
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