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Random variables x and y have the joint density function
fxy(x,y)={ (a(2x+y)^2)/20 -1 < x < 1 -3 < y < 3}{ 0 elsewhere }
a) Find the value of the constant a
b) Find all the second order moments of X and Y
c) What are variances of X and Y
d) What is the correlation coefficient
At α = .05, is there a difference in variances? Illustrate all steps clearly, including the illustration of the decision rule.
Out of the 109 males, 42% preferred Pepsi and out of the 53 females, 40% preferred Pepsi. Pepsi wanted to test to determine if the males preferred Pepsi more than females.
How many subsets of S contain either the number 6 or the number 15?
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Estimate the value of the population proportion.
Create the estimated regression equation by calculating the values of b 0 and b 1
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
Using any present or past job related data, perform an ANOVA in either Excel or MegaStat. Write your null and alternate hypothesis. Post your ANOVA table. Interpret the results.
What are the endpoints of a 95 percent confidence interval for the proportion defective. (Round your answers to 3 decimal places).
Market researchers would like to know if customers prefer a well-known brand over a generic brand of soft drink. They give a large sample of people the two drinks to taste in a random order and ask them which one tastes better.
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
The average family size was reported as 3.18. A random sample of families in a particular school district resulted in the following family sizes: 5 4 5 4 4 3 6 4 3 3 5 6 3 3 2 7 4 5 2 2 2 3 52
If 20 measurements are taken and their standard deviation is 1.8, is there enough evidence to reject the claim that her standard deviation is within the limit at ∞ = .01?
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