A Test Specialist Is Attempting to Find the Reliability of a Test

Short Answer

A test specialist is attempting to find the reliability of a test designed to assess drug dependence. Ten subjects were randomly selected from a group of individuals. all of whom on a waiting list for a treatment program for drug abuse. The subjects were all given the test and then a week later were retested. The scores were as follows: $$\begin{array} { c r c } \text { Subject\# } & \text { Test } & \text { Retest } \\1 & 45 & 50 \\2 & 35 & 32 \\3 & 50 & 54 \\4 & 67 & 70 \\5 & 45 & 40 \\6 & 55 & 60 \\7 & 65 & 62 \\8 & 50 & 48 \\9 & 60 & 70 \\10 & 45 & 40\end{array}$$ Find the test-retest reliability value.