QUESTION 7 The aptitude test scores for measuring students' cognitive ability level vsere normally distributed, with a mean of 72 and a standard deviation of
QUESTION 7 The aptitude test scores for measuring students' cognitive ability level vsere normally distributed, with a mean of 72 and a standard deviation of 5. a) Find the probability that a student score more than 85 marks. (3 marks) b) Find the probability that a student score at least 70 marks. (3 marks) 0) Given that 12.1% of the students score less than it marks, find the value of k. (4 marks)
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