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please help solve 2. A bus driver records the time it takes to commute to school for six days. Those results are: 25, 22, 17,

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2. A bus driver records the time it takes to commute to school for six days. Those results are: 25, 22, 17, 20, 15, and 10. Assume the population is normally distributed. [4 marks] a. What is the value of the sample mean? b. What is the value of the sample standard deviation? c. Find the upper and the lower confidence limits of the 90% confidence interval

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