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QUESTION 17 Suppose that the distribution of calories in a small chocolate bar is normal with a mean of 225 and a standard deviation of 12. Find the probability that a randomly selected chocolate bar will have more than 250 calories? Round your answer to four decimal places. Find the probability that a randomly selected chocolate bar will have less than 215 calories? Round your answer to four decimal places. Find the probability that a randomly selected chocolate bar will have between 200 and 230 calories? Round your answer to four decimal places. QUESTION 18 The time spent sleeping (in hours) for college students is normally distributed with a mean of 6.3 hours and a standard deviation of 1.4 hours. What is the shortest time spent sleeping that would still place a college student in the top 3% of sleeping times? Round your answer to two decimal places. QUESTION 19 Suppose that the length of stay at the emergency department is normally distributed with a mean of 5 hours and a standard deviation of 1.5 hours. Between what two values does the middle 80% of the lengths lie? O 2.841 and 7.159 3.078 and 6.922 3.274 and 6.726 O 3.445 and 6.555