The weight of corn chips dispensed into a 15-ounce bag by the dispensing machine has been identified as possessing a normal distribution with a mean of 15.5 ounces and a standard deviation of 0.3 ounce. Suppose 400 bags of chips are randomly selected. Find the probability that the mean weight of these 400 bags exceeds 15.6 ounces.
A) .6915 B) approximately 0 C) .1915 D) .3085
Question 2
Transportation officials tell us that 90 of drivers wear seat belts while driving. What is the probability of observing 511 or fewer drivers wearing seat belts in a sample of 600 drivers?
A) approximately 1 B) 0.9 C) approximately 0 D) 0.1
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