Abiology class designed a study to see whether coffee drinkers or non-coffee drinkers remember
names better. 50 teachers were randomly selected. some of the teachers who were selected drink coffee and some do not. they were given the same list of student names to study and asked to recall as many as possible.
part a. is this an observational study or an experiment? explain.
part b. the study found a positive relationship between the ability to remember names and people who regularly drink coffee. therefore, drinking coffee people remember names. is the stated conclusion reasonable? why or why not?
part c. what is the population for the study? what is the sample?
part d. given the sample selected for this study, what type of bias do you think might apply? how would you suggest selecting a sample that better avoids sample bias?
part e. describe how you would change this study to allow for the researchers to best make a connection between coffee drinking and the ability to recall names. why is this better than the original study?