Part (c) Find the probability that the child spends less than 1 hour per day unsupervised. Write the probability statement. Pa What is the probability? (Round your answer to four decimal places.) a Sketch the graph. 10 -4 -2 - X 0 2 6 8 10 O -4 - X -2 0 2 4 6 8 10 -4 X -2 0 2 6 8 10 X -4 -2 0 2 4 6 8 10 Part (d) What percent of the children spend over 10 hours per day unsupervised? (Round your answer to four decimal places.) Part (e) 70% of the children spend at least how long per day unsupervised? (Round your answer to two decimal places.) hr Additional Materials17. [1/9 Points] DETAILS PREVIOUS ANSWERS ILLOWSKYINTROSTAT1 6.2.077.HW. MY NOTES PRACTICE ANOTHER In China, four-year-olds 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 survey one Chinese four-year-old living in a rural ar We are interested in the amount of time the child spends alone per day. Part (a) In words, define the random variable X. O the time (in hours) a child in China spends unsupervised per day the time (in hours) a four-year-old in China spends unsupervised per week the time (in hours) a four-year-old in China spends unsupervised per day the number of four-year-old Chinese children that live in rural areas the number of Chinese people that live in rural areas Part (b) Give the distribution of X. x - 3 0 0 )19. [0/2 Points] DETAILS PREVIOUS ANSWERS ILLOWSKYINTROSTAT1 6.2.084.HW. MY NOTES PRACTICE ANOTHE An expert witness for a paternity lawsuit testifies that the length of a pregnancy is normally distributed with a mean of 280 days and a standard deviation of 13 days. An alleged father was out of the country from 247 to 303 days before the birth of the child, so the pregnancy would have been less than 247 days or more than 303 days long if he was the father. The birth was uncomplicated, and the child needed no medical intervention. What is the probability that he was NOT the father? Calculate the z-scores first, and then use those to calculate the probability. (Round your answer to four decimal places. 0.9762 X What is the probability that he could be the father? (Round your answer to four decimal places.) .0238 X Additional Materials Reading