question archive The unit coordinator wants to establish the number of hours students spend studying course materials on a weekly basis
The unit coordinator wants to establish the number of hours students spend studying course materials on a weekly basis
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The unit coordinator wants to establish the number of hours students
spend studying course materials on a weekly basis. The hours are normally distributed with a mean of 19.5 and a standard deviation of 5.2. A random sample of 36 students is taken.
a) What is the probability that the average hours in the sample will be between 17.5 and 21.7? (3 marks)
b) What is the probability that the hours in the sample will be greater than 21.7 (2 marks)
c) What is the probability that the hours in the sample will be less than 20.6 (2 marks)
