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Question: Paired or unpaired? In each of the following settings, decide whether you should use paired t procedures or two-sample t procedures to perform inference. Explain your choice.
(a) To compare the average weight gain of pigs fed two different rations, nine pairs of pigs were used. The pigs in each pair were littermates. A coin toss was used to decide which pig in each pair got Ration A and which got Ration B.
(b) Separate random samples of male and female college professors are taken. We wish to compare the average salaries of male and female teachers.
(c) To test the effects of a new fertilizer, 100 plots are treated with the new fertilizer, and 100 plots are treated with another fertilizer. A computer's random number generator is used to determine which plots get which fertilizer.
let x be binaomial with parameters n 15 and p .2a find the expression for the density for xb find the expression for
Assume that the salaries of male and female professors are both normally distributed with equal standard deviations.
Explain the resource-based view and its relation to strategic management
Models for panel data and Regression model for longitudinal data (with emphasis on models, assumptions and application).
Two samples of sizes 25 and 35 are independently drawn from two normal populations, where the unknown population variances are assumed to be equal.
The loss of vitamin C over time is clear, but with only 2 loaves of bread for each storage time we wonder if the differences among the groups are significant.- Use the Kruskal-Wallis test to assess significance and then write a brief summary of wh..
An airline estimates that 90% of people booked on their flights actually show up. If the airline books 71 peopleon a flight for which the maximum number is 69, what is the probability that the number of people who show up will exceed the capacity ..
Can you think of an example where regression analysis can be used? How is regression analysis being used in a retail environment, or how should it be used?
Using the 0.10 level of significance, apply the Kolmogorov-Smirnov test for normality in examining whether the population of cleaning times might be normally distributed.
What conditions (if any) on the probabilities and the branches will get the third and fourth moments of one step to agree with those of Brownian motion across the same time step?
At 0.05 level significance, is there evidence of the difference in proportion of dvds purchased on basis of the kind of media used (Mailing, E-Mail)?
a 95 confidence interval for a population mean u is given as 18.958 21.015. this confidence interval is based on a
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