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It is believed that first-year salaries for new fresh graduates follow a normal distribution with a...

It is believed that first-year salaries for new fresh graduates follow a normal distribution with a standard deviation of RM2,500. A random sample of 24 newly fresh graduates was chosen.

a. Find the probability that the sample standard deviation is more than RM3,000.

b.Find the probability that the sample standard deviation is less than RM1,500

Math   Statistics-And-Probability   
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