COMM 2333

Research Assignment #4

Examine the hypothetical data on page 2 that displays what a group of students in COMM 2333 answered to two questions: (1) their expected final grade in the course, and (2) an estimate of how many hours each week they spent studying for the course. After examining these data, answer the following questions:

1. For each variable in this sample: what is the

(a) Mean? Grade ______ Hours _______

(b) Median? Grade ______ Hours _______

(c) Range? Grade ______ Hours _______

2. Are there any reliability or validity questions that might concern these two variables (e.g., how each variable was measured)?

(a) "Grade"--Reliability and validity:

(b) "Hours"--Reliability and validity:

Hypothetical StudyIn the last week of classes, the following students (1-23) were asked to indicate their answers to two questions. (1) What is your expected course grade in COMM 2333, and (2) how much time did you spend studying each week for the course? The responses were as follows:

Person Course Grade Reported weekly time spent studying

(A=4, B=3, etc.) (Hours reported by students)

1 2 2

2 4 12

3 0 3

4 2 1

5 1 4

6 0 1

7 4 9

8 3 8

9 1 2

10 2 3

11 3 5

12 0 0

13 4 11

14 1 4

15 2 1

16 3 7

17 1 3

18 4 3

19 1 1

20 2 0

21 2 2

22 3 5

23 4 4