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To determine how the number of housing starts is affected by mortgage rates, an economist recorded the average mortgage rate and the number of housing starts in a large country for the past 10 years. These data are listed here.
Rate 8.5 7.8 7.6 7.5 8.0 8.4 8.8 8.9 8.5 9.0Starts 115 111 185 201 206 167 155 117 133 150
(a) Determine the regression line.
(b) What do the coefficients of the regression line tell you about the relationship between mortgage rates and housing starts?
Binomial distribution to find out the mean also standard deviation. Variance and standard deviation of a lot of 300 calculators.
A report on the U.S. economy indicates that 28% of Americans have experienced difficulty in making mortgage payments. A news organization randomly sampled 400 Americans from 10 cities named the "fastest dying cities in the U.S."
Suppose we have the following information from a simple regression: What is the coefficient of determination? What is the correlation coefficient?
What is the probability that a randomly chosen package is improperly sealed?
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control.
Change the last number in that set from 36 to 14 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
The null hypothesis is to be tested at 95% confidence. Determine the critical values for this test.
Gas Station pump signs, at one chain, encourage customers to have their oil checked, claiming that one out of every four cars should have its oil topped.
Find a dataset: approximately 30-100 scores or observations. Write a null and alternative hypothesis, conduct a statistical significance test (in SPSS or Excel), and tell what decision you'd make about the null hypothesis, and why.
The data was used to make inferences regarding the other students taking the course. Construct a 95% confidence interval estimate. Explain your findings so that your non-quantitative partner will understand them. Their data is below:
Determine the percent of the days is the price between $38.00 and $40.00?
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