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Question: Consider the random variable X.
Prove that V(X) = E(X2) - E2 (X) [V (X) is the variance of X].
A State University uses thousands of fluorescent light bulbs each year. The brand of bulb it currently uses has a mean life of 900 hours. A manufacturer claims that its new brands of bulbs
Determine relative frequency of X=4? Generate the cumulative frequencies.
the advertising firm of mcmann and tate has put out bids for two separate contracts. based on past experience they
The city council of Pine Bluffs is considering increasing the number of police in an effort to reduce crime. Before making a final decision,
1.i have three groups for which i want to perform an anova. they have standard deviations s1 2.5 s2 3.4 s3 6.4 and
What are examples in which non-parametric tests are used to analyze business related problems in general, and more specifically, problems related to marketing?
Determine the estimated population mean?
Compute a chi-square test for goodness of fit for each of the following, using the .05 level for each. In each problem, the expected distribution is equal frequencies in each category.
Waiting time at a bank drive-in widow the average waiting time at a drive-in window of local bank is 10.3 minutes,
Suppose a population can be approximated by a normal model with expected value μ = 50 and standard deviation σ = 9.8. Find the probability that a random sample of size 4 has a mean x between 47.8 and 53.7.
Standard deviation of the population is 9 hours. Give the null and alternative hypotheses. Compute the test and p-value. Use a=0.01 to make your conclusion based on the p-value.
Describe what assumptions must be met to use this test. Finally, where in your course project data set might you employ a paired t-Test?
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