Suppose 4-year-olds in a certain country average 3 hours a day unsupervised and that most of...

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Suppose 4-year-olds in a certain country average 3 hours a day unsupervised and that most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.8 hours and the amount of time spent alone is normally distributed. We randomly survey one 4-year-old living in a rural area. We are interested in the amount of time the child spends alone per day. a. Give the distribution of X. X~ b. Find the probability that the child spends less than 1 hour per day unsupervised. Write the probability statement. What is the probability? (Round your answer to four decimal places.) (P?) c. What percent of the children spend over 10 hours per day unsupervised? (Round your answer to four decimal places.) % d. 90% of the children spend at least how long per day unsupervised? (Round your answer to two decimal places.) hours Suppose 4-year-olds in a certain country average 3 hours a day unsupervised and that most of the unsupervised children live in rural areas, considered safe. Suppose that the standard deviation is 1.8 hours and the amount of time spent alone is normally distributed. We randomly survey one 4-year-old living in a rural area. We are interested in the amount of time the child spends alone per day. a. Give the distribution of X. X~ b. Find the probability that the child spends less than 1 hour per day unsupervised. Write the probability statement. What is the probability? (Round your answer to four decimal places.) (P?) c. What percent of the children spend over 10 hours per day unsupervised? (Round your answer to four decimal places.) % d. 90% of the children spend at least how long per day unsupervised? (Round your answer to two decimal places.) hours

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a The distribution of X which represents the amount of time a 4yearold child spends alone per day is ... View the full answer