When analyzing data with a regression, statisticians are often concerned with the residuals. What are residuals and why are they important?
What will be an ideal response?
The difference between predicted and observed values is called a residual. Although a formal analysis of residuals in the multivariate context can be tricky, a systematic scrutiny of their sizes may reveal some aspects of the data worth exploring further. By subtracting the predicted value from the observed value of Y, we can identify large or small values that stand out from the rest. For whatever reason, these cases do not seem to fit the mold. It is important to try to understand why these cases stand out to better understand the relationship between variables. Perhaps, a mistake was made in coding the data. Maybe these are particularly interesting cases that need further explanation. One way or the other, they are important.
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The political economy of a social agency:
a. Has little effect on its survival and influence. b. Is a key element to its survival and influence. c. Has to do with the goods and services it provides. d. Is the agency’s source of income.
Rhonda designs an experiment in which half of her participants are randomly assigned to view a sad movie and half view a comedy, but all participants fill out three mood surveys at one, two, and three weeks after the movie. This is an example of
a. a between-participants design. b. a within-participants design. c. a non-equivalent posttest-only design. d. a mixed-model, factorial design.
Which of the following statements is true of individual income taxes?
A. State individual income taxes rise as sharply as the federal income tax. B. Most states allow local governments to levy income taxes. C. It is one of the two largest revenue sources for state government. D. Individual income tax is an important source of revenue for local government. E. All states collect individual income taxes without any exception.
Interest groups deal with a __________ range of issues and represent a __________ segment of a country's population
a. narrower; more limited b. wider; more limited c. narrower; unrestricted d. wider; limitless e. limitless; wider