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Unformatted text preview: A random sample of 100 students was taken. (a) What is the probability that more than 30 students in the sample were dissatisfied with the food service? (b) What is the probability that the number of students in the sample who were dissatisfied with the food service was between 46 to 52? (2003, Q5) The amount of time necessary to travel to Japan from Hong Kong is assumed to be a normal distribution with mean 5 hours and a standard deviation of 0.25 hour. a. What is the probability that it will take between 4.5 and 5 hours? b. Give the range of values symmetric about the mean such that the probability that the travel time is within that range is 80%....
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 Spring '09
 AnthonyChan

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