64. Suppose only 70% of all drivers in a certain state regularly wear a seat belt. A...
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64. Suppose only 70% of all drivers in a certain state regularly wear a seat belt. A random sample of 500 drivers is selected. What is the probability that
a. Between 320 and 370 (inclusive) of the drivers in the sample regularly wear a seat belt?
b. Fewer than 325 of those in the sample regularly wear a seat belt? Fewer than 315?
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Related Book For 
Modern Mathematical Statistics With Applications
ISBN: 9780534404734
1st Edition
Authors: Jay L Devore
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