Consider the following dot plot. of the following statements, which two characteristics of this dot plot make the median a better choice than the mean to summarize the center of the distribution? the data are skewed and there is an outlier. the data are symmetric and there is an outlier. the peak is equal to the median and the data are skewed. the mean is equal to the median and the data are symmetric.

Stu and ambrose are working together on a study of whether diet is related to students' mental health. first, they randomly select 10 students from the student center and 10 students from the office of counseling and psychological services. then, they ask students to rate their diet in terms of healthiness on a scale of 1-100 before completing a 20-item mental health survey. a) name one of the constructs being studied b) how was the construct you named above operationally defined in this experiment? e) was the variable you described above their independent variable, their dependent variable, or a controlled variable? d) what is a confounding variable? what is a potential confound in this study?