1. If the height of 300 students is normally distributed with mean 68 in and standard deviation 0.0025 in, how many students have height greater than 72 in? 2. Studies show that gasoline use for compact cars sold in the Batu Pahat is normally distributed, with a mean of 25.5 miles per gallon (mpg) and a standard deviation of 4.5 mpg. What percentage of compacts gets 30 mpg or more? 3. A study of lease rates for a selection of 2006 cars revealed that the average monthly rate for a vehicle was RM 220.67. The standard deviation was RM 59.63. Assume that the rates follow a normal distribution. (a) What is the probability that a random car will lease for less than RM 150? (b) Find the probability that a random car will lease for more than RM 350? 4. Based on data from ACT in 2007, the average science reasoning test score was 20.9, with a standard deviation of 4.6. Assuming that the scores are normally distributed: (a) Find the probability that a randomly selected student has a a science