For each problem, select the best response. (a) Can one predict a student\'s sco
ID: 3266888 • Letter: F
Question
For each problem, select the best response.
(a) Can one predict a student's score on the midterm test in a statistics course from the number of hours the student spent studying for the test? To explore this, the teacher of the course asks students how many hours they spent studying for the test and then makes a scatterplot of the time students spent studying and their scores on the test. In making the scatterplot, the teacher should
A. plot the score on the test on the horizontal axis.
B. plot time spent studying for the test on the horizontal axis.
C. first determine if the scores on the test approximately follow a normal distribution.
D. use a plotting scale that makes the overall trend roughly linear.
E. None of the above.
(b) Does mandatory gun ownership prevent crime? To study this, the number of burglaries committed each month in a small town were recorded for 75 months prior to passage of a bill requiring citizens to own guns and for 56 months after passage of the bill. The goal was to see if the number of burglaries committed was affected by requiring citizens to own guns. The response variable here is
A. the number of burglaries committed.
B. whether or not a burglary was committed by a gun owner.
C. whether or not gun ownership is required by law.
D. the number of guns owned.
E. None of the above.
(c) A gambler conducts a study to determine whether the time it took a horse to run its last race can be used to predict the time it takes the horse to run its next race. In this study, the explanatory variable is
A. the time it takes a horse to run its next race.
B. the gambler's winnings.
C. all horses used in the study.
D. the time it took a horse to run its last race.
E. None of the above.
Explanation / Answer
Question1:
Plot time spent studying for the test on the horizontal axis.
Explanation:
Scores depend on number of hours studied. Hours studied is the independent variable and scores is the dependent variable.
The independent variable is plotted on the horizontal axis.
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