To see if curriculum changes are effective, researchers took a sample of 100 eighth graders' standardized test scores from this year and compared them to a sample of 100 scores of last year's eighth graders (on the same exam).

decide whether the study was a paired design using repeated measures, a paired design using matching, or an independent groups design.

question 1 options:

paired design using repeated measures

independent groups design

paired design using matching

each student in an intro stat class walked 100 yards twice. once with arms down at his/her sides, another time while "pumping" arms up and down with each stride. the order of "pumping" or "not" was randomized for each student. heart rate (beats per minute) was measured after each walk.

decide whether the study was a paired design using repeated measures, a paired design using matching, or an independent groups design.

question 2 options:

paired design using repeated measures

independent groups design

paired design using matching