Exam 2: C: Reading and Evaluating Scientific Research

A teacher is disappointed to find that most of her students' test scores are clustered together at the low end of the grading scale,with only a few students having high grades.If she were to graph the distribution,what shape would you expect it to have?

To increase the generalizability of their results,researchers try to study a ________ sample of participants.

A medical doctor believes that the presence of aromatherapy candles will reduce the anxiety of first-time mothers-to-be during labour and will increase their reported satisfaction with their care at his hospital.He randomly assigns mothers to give birth in a room either with or without aromatherapy candles.What is the independent variable in this example?

Which of the following is the correct description of frequency?

Which of the following is subjective?

When designing a study,researchers must take into account all of the following factors EXCEPT

Without the process of replication as part of the scientific process,what would happen?

Why is it important to make sure that different participant groups are roughly equivalent in terms of personal characteristics (e.g. ,age,gender)before any independent variable is introduced?

Ada's professor tells her class that the average score on the last test was 72 points.Ada wants to know if most students actually scored near 72,or if the grades were more spread out,with many students doing much better or worse than a 72.What statistic could Ada ask her professor to calculate to help answer her question?

Professor Golder is studying hyperactivity in preschool-age children.She is concerned that differences in child rearing,diet,and home environment may affect her results.To minimize these potential pre-existing variables,she should be sure to do which of the following?

If a set of data has a skewed distribution,which measure of central tendency should be used?