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1) If X is a Poisson distributed random variable with a mean of 3, and Y is another Poisson distributed random variable with a mean of 2, and the two are independent, what is the varianceof the sum X+Y?
2) If X is a random variable having a binomial distrubution with n=20 and p=.4, and Y is transformed version of X, where Y=2X+3, what is the expected value of Y?
Examine the histogram of the standardized residuals for the regression of annual earning on annual hours worked among Registered Nurses below. Which conclusions can be made about the model using this graphic?
Multiple regression equation relating expected travel cost (Y) number of days, (Y (x1) ) number of days on the road and distance traveled (X2).
suppose you work for a firm that manufactures a product using raw materials and several components that are purchased
To reduce operating costs, First UP Bank wants to make sure that the loan department in its branches manage the number of courier packages sent out to appraisers etc.
A cyclist traveled at a rate of 32 mph to visit a nearby town. The cyclist averaged 10 mph on the return trip. If the round trip took 6.3 hours, find the distance to the nearby town.
The kinds of statistical methods that were used to formulate the author's argument.
Determine whether and how each of the following factors would shift the demand curve for chiropractic visits:
What do you notice about the two histogrum and (therefore) about the estimates of probability of getting above 0?
some commercial airplanes recirculate approximately 50 of the cabin air in order to increase fuel efficiency. the
Value of s^2 (s(squared)), is less than or equal to 0.01 even though s = 0.0075. What is to be done with a shipment of this glass for which the sample variance of the indices of refraction equaled 0.000182?
Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. What is the value of the sample test statistic? (Round your answer to two decimal places.)
In a random sample of 10 on-line statistics students, information was collected about their minutes studied and their chapter test scores. Is this relationship positive, negative or no relation?
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