Sketch out a related graph

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In China, six-year old children average three hours per day of unsupervised activity (not including sleep/rest times). Most of the unsupervised children live in very rural areas that are considered to be quite safe. Suppose that the time spent alone is normally distributed with a standard deviation of 0.5 hours. Based on this information.

a. Sketch out a related graph.

b. What is the probability that a child in this study will spend between 2.5 and 3.5 hours per day in unsupervised activity?

c. What is the probability that a child will spend less than 2 hours and 15 minutes per day in unsupervised activity?

d. What is the probability that a child will spend more than 4 hours 10 minutes per day in unsupervised activity?

e. How long would a child have to remain unsupervised in this study for him/her to be 3.05 standard deviations above the mean? How uncommon would this be?

Reference no: EM132399807

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