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8 November, 20:21

According to a college survey, 22% of all students work full time. find the mean for the number of 3) students who work full time in samples of size 16.

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  1. 8 November, 21:11
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    Assuming that the students worldwide are being considered, because of the extremely large population, this can be considered as a binomial distribution. A normal distribution is used most usually as a fair approximation of the binomial. The mean is the expectation, therefore:

    E[x] = np = (16) (0.22) = 3.52

    μ = 3.52
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