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A professor develops a scale that he believes measures spiritual maturity. To establish the reliability of his scale he administers the test to a...

A professor develops a scale that he believes measures spiritual maturity.  To establish the reliability of his scale he administers the test to a group of students at 6 week intervals.  
Test Retest
45
68
51
78
48
80
78
70 35
75
52
60
75
72
85
78
a. Is the test measuring a stable construct?  Conduct and interpret the appropriate analysis to determine reliability of the test
b. Construct the appropriate graph to illustrate the data
See attached file for full problem description.

A professor develops a scale that he believes measures spiritual
maturity. To establish the reliability of his scale he administers the
test to a group of students at 6 week intervals.
Test Retest
45
68
51
78
48
80
78
70 35
75
52
60
75
72
85
78
a. Is the test measuring a stable construct? Conduct and interpret the
appropriate analysis to determine reliability of the test (15 pts.)
b. Construct the appropriate graph to illustrate the data (5 pts.)

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