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An experiment that is highly controlled is said to have

A young researcher is interested in whether seniors spend more time than freshman studying in the library. Having obtained the percent of students who are freshman and seniors from the administration, the researcher proceeds to ask seniors and freshman how much time they spend in the library, making sure the sample matches the correct % for freshman and seniors, respectively. The researcher has used

22-25. Match the descriptions of the mode of inquiry with the term it BEST describes.

Research is deductive

Dr. Frank N. Stein developed an aggression measure and had his students fill out the measure and an already existing measure of aggression. He found that students’ scores on the two measures were moderately correlated. This is an example of

A time series was modeled as a Poisson hidden Markov model with three states.  The R output is below.  What is the estimated Poisson mean when in state 2?

ARCH models represent the residual series as a moving average process. 

Time series, cross-correlation, and ACF plots for series A and series B are below.  Series A leads series B. 

Consider the following time series plot: Does this time series appear to be a candidate for a hidden Markov model?  Explain. 

Time series, cross-correlation, and ACF plots for series A and series B are below.  The ACF plots indicate both series should be modeled as MA processes.