Assignment:
Q: In a certain microwave oven on the high power setting, the time it takes a randomly chosen kernel of popcorn is normally distributed with a mean of 140 seconds and a standard deviation of 25 seconds. What percentage of the kernels will fail to pop if the popcorn is cooked for (a) 2 minutes? (b) 3 minutes? (c) if you wanted 95 percent of the kernels to pop, what time would you allow? (d) if you wanted 99 percent to pop?