A study was to be conducted to explore the effects of sugar intake on activity level of children. Researchers recruited 48 children for the study, and began by classifying the children as being of preschool age (P) or in elementary school (E).
a. What percentage of children were in preschool and what percentage were in elementary school?
b. Which type of school is in the majority?
c. What other word can be used in general to describe a value that is in the majority?
d. If a researcher wants to report the proportion of participants in elementary school, should this be denoted as p or ?
e. If the researchers suspect that age may play an important role in the extent to which sugar intake affects activity, tell how this should be incorporated into the study's design.