(b) A random sample of 50 cars was taken from the population of 5000 cars. The average commuting time for the population

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(b) A random sample of 50 cars was taken from the population of 5000 cars. The average commuting time for the population

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B A Random Sample Of 50 Cars Was Taken From The Population Of 5000 Cars The Average Commuting Time For The Population 1
B A Random Sample Of 50 Cars Was Taken From The Population Of 5000 Cars The Average Commuting Time For The Population 1 (41.79 KiB) Viewed 30 times
(b) A random sample of 50 cars was taken from the population of 5000 cars. The average commuting time for the population is 45 minutes with standard deviation of 15 minutes. (i) (ii) Determine the probability that the sample mean is within 5 minutes from the population mean. (6 marks) Explain whether the answer in Q2(b)(i) is exact or an estimate. (2 marks) (iii) Determine the probability in Q2(b)(i) by using the sample size of 200. (8 marks)
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