Share Prob & Stats: Chapter 4 Review
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True or False: If the r value = 0.80 then 80% of the change in the response variable is due to a change in the explanatory variable.
False.
Scientists have shown the more Chuck Norris posters on a classroom wall, the better students do in the class. The response variable is: ______
How well students do in the class.
Which of these is NOT a possible r value for an indirect relationship? 0.5 or -0.5 or -1
r = 0.5
If the LSRL is: Distance Traveled = 82 + 30(Gallons of gas), what would be the predicted distance for 12 gallons?
442 miles
(gallons, distance) = (5, 240) is a point on our actual chart. What is the residual if the LSRL equation is Distance Traveled = 82 + 30(Gallons of gas)?
8
r = .7. What percent of the change in response variable is NOT due to a change in explanatory variable?
51%
True or False: If r = 1 then the explanatory variable definitely caused the response variable. Correlation means causation.
False
If r = -.85 which of these word(s) would be appropriate to use with the data set? {direct, indirect, weak, moderate, strong}
indirect & strong
