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Name_________________________

Descriptive Statistics and Correlation

Consider these data and then fill-in-the-blanks at the bottom of this page.

                                       Research Methods Final Grade                            Reported Number of Hours
                                (measured as GPA ranging from 0 to 4)                 Spent Studying for Final Exam

Person

1                                                              4                                                                              20
2                                                              3                                                                              20
3                                                              0                                                                                8
4                                                              2                                                                                9
5                                                              2                                                                              15
6                                                              2                                                                              15
7                                                              3                                                                              16
8                                                              0                                                                                3
9                                                              1                                                                                5
10                                                            3                                                                              10
11                                                            1                                                                                8
12                                                            2                                                                                6
13                                                            2                                                                                7
14                                                            0                                                                                8
15                                                            0                                                                                3
16                                                            3                                                                               11
17                                                            4                                                                               17
18                                                            1                                                                                 8
19                                                            2                                                                                 9
20                                                            3                                                                               12
21                                                            3                                                                               14
22                                                            3                                                                                 7
23                                                            1                                                                                 6
24                                                            2                                                                                 5
25                                                            3                                                                                 8

A.  For each variable
        in the sample:

        1. What is the
            arithmetic mean?               ________                                                              ________

        2. What is the mode?            ________                                                              ________

        3. What is the median?          ________                                                              ________

        4.  What is the
              standard deviation?         ________                                                              ________

B. Now compute a Pearson Product Moment correlation between the two variables. Use the back of
    this sheet or attach pages on which you show your work.

       1.  What is the observed correlation?____________________________________________

       2.  What type of relationship is this one?_________________________________________

       3.  How may this correlation be interpreted verbally?________________________________