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10-09-2022
Mathematics

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Zodwa, the operations manager of a large production plant would like to estimate the mean
amount of time a worker takes to assemble a new electronic component. Assume that the standard
deviation of this assembly time is 3.6 minutes.
3.1.1. After observing 120 workers assembling similar devices, Zodwa noticed that their
average time was 16.2 minutes. Construct a 92% confidence interval for the mean
assembly time. (9)

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