SOLUTION: Assume that 67% of the cars on a particular freeway are traveling faster than 70 miles per hour. A random sample of 15 cars was observed under normal driving conditions with no po
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Question 450299: Assume that 67% of the cars on a particular freeway are traveling faster than 70 miles per hour. A random sample of 15 cars was observed under normal driving conditions with no police car in sight. What is the probability that 8 or more of them were going faster than 70 miles per hour? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Assume that 67% of the cars on a particular freeway are traveling faster than 70 miles per hour. A random sample of 15 cars was observed under normal driving conditions with no police car in sight. What is the probability that 8 or more of them were going faster than 70 miles per hour?
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Binomial Problem with n = 15 and p = 0.67
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P(8<= x <=15) = 1-P(0<= x <=7) = 1 - binomcdf(15,0.67.7) = 0.9163
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Cheers,
Stan H.
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