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Mathematics, 14.04.2020 06:49 jeffreydaboy1223
In China, children four years old's average three hours a day unsupervised. Most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.5 hours and the amount of time spent alone is normally distributed. We randomly select one Chinese four year old living in a rural area. we are interested in the amount of time the child spends alone per day. find the probability that the child spends less than one hour per day unsupervised.
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In China, children four years old's average three hours a day unsupervised. Most of the unsupervised...
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