Drivers in the sample regularly wear a seatbelt

Reference no: EM1395269

Suppose that only 40% of all drivers in California regularly wear a seatbelt. A random sample of 500 drivers is selected. Assuming a binomial distribution, what is the probability that:

a. Between 180 and 230 (inclusive) of the drivers in the sample regularly wear a seatbelt? Hint: Use the BINOMDIST function in Excel.

b. Fewer than 175 of those in the sample regularly wear a seatbelt?

Reference no: EM1395269

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