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Suppose that only 25% of all drivers come to a complete stop at an intersection having flashing red lights in all directions when no other cars are visible.
a. What is the probability that, of 20 randomly chosen drivers coming to an intersection, at least 6 will come to a complete stop?
b. What is the probability that 5 cars need to come to the intersection to obtain the first complete stop.
c. What is the probability that at most 12 cars need to come to the intersection to obtain 5 complete stops. (Hint: 7 failures till the 5th success)
determine if the improvement is of practical significance one should. Crop researchers plant 100 plots with a new variety of corn. The average yield for these plots is x' = 130 bushels per acre
The population are shorter than 66 inches, what is the probability a randomly selected member of this population is between 66 and 76 inches tall?
the highway safety department wants to study the driving habits of individuals. a sample of 121 cars traveling on the
1.a company is studying their processes and for one of them the acidity of the mixture is critical. they have obtained
the most common therapy for warts is cryotherapy in which liquid nitrogen is applied to the area of the wart every few
Is it necessary to assume a normal distribution on the population to estimate the value of the mean spending per day? Explain.
Estimate the percentage of adult Internet shoppers in order to determine the maximum impact of Internet shoppers on its sales, what percentage of Internet shoppers should be used?
a certain brand of candies have a mean weight of 0.8608g and a standard deviation of 0.052 bsed on a sample of a
in a few sentences can you explain why is it important to be able to translate reported findings for research studies
question berdines chicken factory has several retail stores. when interviewing applicants for server positions the
type your question here although most of us buy the mil by the quart or gallon farmers measurdaily production in
Suppose the random variable X is normally distributed with mean =50 and standard deviation =7 calculate P(X).
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