In theory (that is, you are not provided with a dataset to work on), you are requested to conduct two different hypothetical studies:

In the first study, you will be measuring pulse rate of 100 schoolchildren before and after they have taken part in a 10-minute vigorous exercise.

In the second study, you will be measuring the level of satisfaction of the 100 children who participated in study 1.

For each study, discuss the scale of the investigated outcome, the measures of central tendency and variability that will best describe the outcomes. Also, suggest some possible or potential problems in conducting each of the research projects.

Besides the act of participating in the physical exercise, suggest at least three factors that may affect the children's pulse (other than the exercise itself), and explain why.