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An educator has constructed a test for mechanical aptitude He wants to determine how reliable the test is over two administrations spaced by 1 month A study is conducted in which 10 students are

An educator has constructed a test for mechanical aptitude He wants to determine how reliable the test is over two administrations spaced by 1 month A study is conducted in which 10 students are

An educator has constructed a test for mechanical aptitude. He wants to determine how reliable the test is over two administrations spaced by 1 month.

A study is conducted in which 10 students are given two administrations of the test, with the second administration being 1 month after the first. The data are given in the following table.

Student

Administration 1

Administration 2

 

1

0

1

10

 

2

2

1

15

 

3

0

2

17

 

4

5

2

25

 

5

7

2

32

 

6

5

3

37

 

7

3

4

40

 

8

0

4

38

 

9

2

3

30

10

 

47

 

49

a. Construct a scatter plot of the paired scores.

b. Determine the value of r.

c. Would it be fair to say that this is a reliable test?

Explain using r2.

mahesh 24-Aug-2020

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