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The number of incoming calls to a mail order call center is a Poisson random variable with parameter of ?=1.8/min. What is the probability that the number of arriving calls in any minute exceeds three? What is the probability that the number of arriving calls exceeeds three during 20minute interval?
2/Find E(x) fo the following data. fD(d)= 0.08 d=0 ; 0.12 d=1; 0.18 d=2; 0.24 d=3; 0.16 d=4; 0.12 d=5 ;
0.10 d=6
What recommendation would you have for each state to maximize revenue? c. Which state was most likely to be following a political unsupportable policy?
Compare the differences of Simple random sampling & Cluster sampling using specific examples, and show the pros and cons of each method.
Explain the difference between independent samples and dependent samples. Classify the following as independent or dependent samples:
consider the following bivariate data.pointabcdefghijx2510011176y1202340727a construct a scatter diagram of the given
Obtain the empirical influence function for the mean and sketch its influence curve. What does this influence function tell you about the mean (hint: try x = 5 or x
Of a random sample of 600 trucks at a bridge, 114 had bad signal lights. Construct a 95 percent confidence interval for the percentage of trucks that had bad signal lights.
Why is it important to know the standard deviation for a given sample? What do researchers learn about a normal distribution from knowledge of the standard deviation?
in a recent study 90 percent of the homes in the united states were found to have tvs. in a sample of nine homes what
project k costs 70000 its expected cash inflows are 16000 per year for 8 years and its wacc is 13. what is the projects
If this poll had been based instead on 5000 adults, do you think the "95% confidence interval" would be wider or narrower than the interval given?
Weights are distributed normal with a mean of 132 pounds and a standard deviation of 27.4 pounds. In a random sample of 150, how many of them would be expected to weigh between 100 and 115 pounds?
The Internal Revenue Service plans to examine an SRS of individual federal income tax returns from each state. One variable of interest is the proportion of returns claiming itemized deductions.
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