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1. The Office of Personnel Management has been asked to evaluate the clerical exam that is used for the state of Washington. They have permission to run a quasi-experiment. One hundred persons are hired for the clerical positions. They are also given the clerical exam but the exam scores are not used for hiring or placement. After a six month probationary period, the supervisors of these persons are asked to recommend that the clerical workers be made a permanent hire or be terminated. This decision is the dependent variable. It is coded 1 if the person is hired and 0 if the person is terminated. The independent variable is the person's score on the clerical exam. Scores can range from 0 to 100. A regression yields the following result:

Y =.23 + .0064X
r2 = .55 sb=.0012 n=348 t= slope/ sb

a) What are the merits of using a quasi-experimental design?
b) What is one possible dilemma in using a quasi-experimental design?
c) What kind of regression is being used here?
d) Interpret the slope, intercept, and coefficient of determination.
e) What can you say about the relationship between the exam and job performance?
f) What is the probability that a person who scores a 50 on the exam will be made a permanent employee?

##### Solution Summary

The merits of using a quasi-experimental designs are provided. A dilemma and regressions are given.

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1. The Office of Personnel Management has been asked to evaluate the clerical exam that is used for the state of Washington. They have permission to run a quasi-experiment. One hundred persons are hired for the clerical positions. They are also given the clerical exam but the exam scores are not used for hiring or placement. After a six month probationary period, the supervisors of these persons are asked to recommend that the clerical workers be made a permanent hire or be terminated. This decision is the dependent variable. ...

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

##### Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.