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According to an automobile manufacturer, the company uses 3,000 lock-and-key combinations on it's vehicles. Suppose that you find a key for one of those cars.
a) What is the expected number of vehicles that you would have to check to find one that fits your key?
b) What is the probability that you would have to check at least 3,000 vehicles to find one that your key fit?
c) Justify your selection of the probability distribution you choose to model this situation.
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the drying time of a certain type of paint under specified test conditions is known to have mean value 75 minutes.
What is the mean number of children per family? Round your answer to one decimal place as necessary. For example, 4.5 would be a legitimate entry.
two points are selected at random independentlyand uniformly along a 1-meterlong stick and the stick is broken at the
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The mean score for girls was 70 and the standard deviation of mean was 5.0. The mean score for boys was 65 and the standard deviation of mean was 5.0. What is the standard error of the difference in means?
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conduct an historical study of a random variable of your choice collect a sample of observations and provide detailed
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