Using the textbook example of 420 california school districts and the regression of test scores on the student-teacher ratio, you find that the standard error on theslope coefficient is 0.51 when using the heteroskedasticity-robust formula, while it is 0.48 when employing the homoskedasticity-only formula. when calculating the t -statistic, the recommended procedure is to: a. use the homoskedasticity-only formula because the t -statistic becomes larger. b.first test for homoskedasticity of the errors and then make a decision. c.use the heteroskedasticity-robust formula. d.make a decision depending on how much different the estimate of the slope is under the two procedures.

Which of the following scenarios is an example of attentional blink? click or tap a choice to answer the question. while grading a student’s essay, a professor does not notice the mistake in the following sentence: “metacognition is the the awareness of one’s own thought processes.” a waiter is telling two friends about the daily specials when a neighboring table erupts in laughter. the friends ask the waiter to repeat the last few items because their attention was diverted by the sudden loud laughs. you watch television while you study for a language exam. the next day, you are unable to recall the majority of the new vocabulary you thought you had memorized. you are at a loud concert, and you are able to concentrate on the music while blocking out the conversations around you, cell phone rings, and other irrelevant stimuli.