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In a subway station, there are exactly enough customers on the platform to fill three trains. The arrival time of the nth train is X1 + ··· + Xn where X1, X2,... are iid exponential random variables with E[Xi] = 2 minutes. Let W equal the time required to serve the waiting customers. Find P[W > 20].
The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference in among the means?
how much money can be withdrawn at the end of 21 years if 6000 is deposited at the end of each year for 14 years and no
At the 0.05 level, is import/domestic ownership independent of magazine preference? Based on the chi-square table, what is the most accurate statement that can be made about the p-value for the test?
use normal approximation to estimate the probability of getting more than 49 girls in 100 births. assume that boys and
data were collected on annual personal time in hour taken by a random sample of 16 women group 1 and 7 men group 2
suppose that you and a friend play a game with the following rules there is a green player and a blue player there are
Using the six-step critical value approach, at the 0.05 level of significance, is there evidence that the population mean delivery time has been reduced below the previous population mean value of 20 minutes?
The important thing is having a reason for picking the model that you decide on. You should choose a model for overall characteristics like a high R^2 value. Y
What is the standard deviation of the number of requests in a 10 hour work day? Give your answer to four decimal places.
Permutation chi square test to a regular chi square table test. What happens in situations, where assumptions of a chi square test are violated? Discuss.
concepts and applicationsusing the 68-95-99-.7 rule. assume the resting pulse rates for a sample of individuals are
Is there sufficient evidence to support the claim that the diet is effective? Explain. What is the mean weight loss? Is it large enough to make the diet practical for someone wanting to lose weight?
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