Question

CENGAGE MINDTAP Complete: Chapter 4 Problem Set 8. visualizing variability A researcher designs an intervention to combat racism, He also designs a questionnaire to measure racism so he can test the participants' level of racism before and after the intervention. He tests one version of his questionnaire with 45 statements and a shorter version with 12 statements. In both questionnaires, the participants respond to each statement with a rating on a 5-point Likert scale with o equaling "strongly disagree" and 4 equaling "strongly agree. The overall score for each participant is the mean of his or her ratings for the different statements on the questionnaire. Look at the following graphs. Graph I graphs the results from the short version, and Graph II graphs the results from the long version. Graph II Graph I PARTICIPANTS PARTICIPANTS 7 4 3 SHORT QUESTIONNAIRE SCORE LONG QUESTIONNAIRE SCORE Complete the following sentences by trusting your eyes to see meaningful differences in the two graphs The range for Graph I is the range for Graph I The mean for Graph 1 is the mean for Graph 11 The variance for Graph 1 is the variance for Graph t1 This implies that the shorter questionraire will be before and after the interventon than the longer questonnaire at detecting ditferences Type here to search ho

Answer 1

the range for graph I is smaller than the range for graph II

the mean for graph I is equal to the mean for graph II

the variance for graph I is smaller than the variance for graph II

this implies that ,,will be less varible then the larger,,,,,,,,