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Parents' income and student loans. How well does the income of a college student's parents predict how much the student will borrow to pay for college? We have data on parents' income and college debt for a sample of 1200 recent college graduates. What are the explanatory and response variables? Are these variables categorical or quantitative? Do you expect a positive or a negative association between these variables? Why?
Ethanol is getting wider use as car fuel when mixed with gasoline. A car manufacturer wants to evaluate the performance of engines using ethanol mix.
In the BS Lottery (which stands for "Business Statistics", of course), players choose 5 numbers out of 30. They win if they choose the same 5 numbers.
Tests of hypothesis for two populations. List one test statistic that could be used for comparing two populations with hypothesis testing. Can you think of an example where this could be used?
you are looking for a home in a particular neighborhood and you want to know the typical number of bathrooms and
blood pressure is a measure of the blood force against the walls of the arteries. the larger value represents the
Construct a 95% confidence interval for the mean monthly rent of all advertised one-bedroom apartments. A 95% confidence interval for the mean monthly rent is?
State the four steps of hypothesis testing. What are two decisions that a researcher makes in hypothesis testing?
It has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes.- Use the 0.10 level of significance in reaching a conclusion. Determine and interpret the p-value for the test.
Construct an x bar- Chart. (Make sure to determine the upper and lower control limits.) Is the process in control? Explain why or why not. Construct an R- Chart. (Make sure to determine the upper and lower control limits.)
If the standard deviation of the price of meals in San Francisco was $10, determine the largest proportion of meal prices that could be larger than $50.
Identify a research question from your professional life or career specialization that can be addressed by an independent samples t test.
to evaluate the success of a 1-year experimental program designed to increase the mathematical achievement of
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