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For the Next Questions, Assume That a Simple Random Sample

Question 4

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For the next questions, assume that a simple random sample has been taken
and the population is normally distributed. Engineers assessing the variation in
wait time at Starbucks, Dunkin Donuts, and Caribou Coffee determined that the
standard deviation of the wait time for a sample of nine customers was 25.6
seconds. Use a 95% confidence level.
-Find the critical value For the next questions, assume that a simple random sample has been taken and the population is normally distributed. Engineers assessing the variation in wait time at Starbucks, Dunkin Donuts, and Caribou Coffee determined that the standard deviation of the wait time for a sample of nine customers was 25.6 seconds. Use a 95% confidence level. -Find the critical value . .

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