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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