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A researcher wishes to determine the relationship between the number of cows (in thousands) in countries in southwestern Pennsylvania and the milk production (in millions of pounds). The data are shown. Describe the relationship
Cows x 70 3 194 12 46 65
Pounds y 115 5 289 15 72 92
a) Find the values of the correlation coefficient and the coefficient of determination.
b) Find the slope, y-intercept, and equation of the regression line for the data.
c) Plot the points and a graph of the regression line on the same axes.
Given what you've learned in this module about the meaning of "statistics", choose one of the examples from Part I (A-F), and raise a relevant question of your own that could be answered by a statistician.
In the accompanying table, the random variable x represents the number of televisions in a household in a certain country. Determine whether or not the table is probability distribution. If it is a probability distribution, find its mean and stand..
Then, give two examples of correlation which are evaluated in a business environment and discuss the decision made by evaluating the correlation.
Find out the decision strategy company must follow, expected value of strategy, and maximum amount the company must pay market research firm for survey results.
Research question: Are the mean crash damages the same for these three vehicles?
As it is a 2 × 2 table, try also two-tailed two-sample z test for π 1 = π 2 and verify that z 2 is same as your chi-square statistic. Which test do you prefer? Explain why?
Find out annual break-even volume for the Rolling Creek Textile Mill.
Find out the finite population correction (FPC).With a population size of 1,000 and a planned sample size of 200, what is the finite population correction.
Plot the control limits for the mean outside diameter and the range.
Hypothesis testing of single mean - The Wall Street Journal reported that the 30-year mortgage rate is now less than 6%.
Given the large difference between the two measures of central tendency, which of the two would you rely on in describing the average claim cost and why?
Critically discuss why you would or would not expect each of the following variables to be normally distributed.
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