A Psychologist Wants to Assess the Reliability of a New

question 34

Short Answer

A psychologist wants to assess the reliability of a new test of Self Control, the higher the scores the higher the level of control. A random sample of college students is selected and given the test. In order to tap the reliability, the test is scored on the basis of comparing the results of the odd items versus the even items. The data follow: $$\begin{array} { c c c } \text { Subject\# } & \text { Odd } & \text { Even } \\1 & 45 & 57 \\2 & 50 & 48 \\3 & 35 & 57 \\4 & 62 & 55 \\5 & 55 & 60 \\6 & 38 & 50 \\7 & 55 & 50 \\8 & 45 & 38 \\9 & 65 & 70 \\10 & 55 & 50\end{array}$$
-What is the correlation between the odd and even items?

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Definitions:

Percentage Points

Percentage points are used to express an absolute difference between two percentages, emphasizing the distinction between percentage changes.

Total Income

The sum of all earnings obtained from labor, capital investments, and any other source before any taxes or deductions are applied.

Income Distribution

The way in which a nation’s total GDP is distributed amongst its population, affecting the economic well-being of its citizens.

Official Poverty Line

A threshold set by the government defining the minimum level of income sufficient to cover basic living expenses, used to identify individuals or households in poverty.