Probability of the student percentile rank is gigh

Assignment Help Basic Statistics

Reference no: EM131811496

Question: A very large group of students takes a test. Each of them is told his or her percentile rank among all students taking the test.

a) If a student is picked at random from all students taking the test, what is the probability that the student's percentile rank is over 90%?

b) If two students are picked independently at random, what is the probability that their percentile rank differ buy more that 10%?

Reference no: EM131811496

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