The following data below shows the average working time recorded (in hours) of part - time working students in a certain fast - food chain. 3.4 2.5 4.8 2.9 3.6 2.8 3.3 5.6 3.7 2.8 4.4 4.0 5.2 3.0 4.8 Assuming that the data represent a random sample from a normal population, construct a 95% confidence interval estimate for u. A 3.31 <µ<4.27 B 3.25

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