MOM BUS 7. TE The regression line shown would have a correlation coefficient closest to a) -0.95 b) 0.5 c) +0.95 d) 0 8. 9. Two variables have a correlation coefficient of r- -0.4. This indicates a) a moderate negative correlation b) a strong negative correlation c) a moderate positive correlation d) a strong positive correlation A relationship in which the independent variable and the dependent variable are reversed in the process of establishing causality is called: a) An accidental relationship b) A reverse cause-and-effect relationship c) A presumed relationship d) A cause and effect relationship Correlation can be described as a) The number of data points in a survey or study b) The relationship or visible trend within a set of data c) The sum of the residuals d) None of the above 10. 11. A residual value is a) The same as the coefficient of determination b) Always positive c) Always negative d) The vertical distance between a data point and the line of best fit A control group in an experiment or study is a) The group where the independent variable is changed b) The same as the experimental group, only smaller c) The group that is in control of the study (including researchers etc.) d) The group where the independent variable is constant compared to the experimental group 12. 13. Why does a strong linear correlation not always represent a cause and effect relationship? a) There could be many extraneous variables that haven't been considered b) There could be a poor sample size or sample method chosen c) The relationship could be accidental d) All of the above