A Researcher Developing a Questionnaire Becomes Aware of an Interesting

question 63

Multiple Choice

A researcher developing a questionnaire becomes aware of an interesting additional relationship that could be investigated at very little cost and effort by adding an additional item to the questionnaire. He knows that this is not vital to his present research purpose. He should

• A) investigate it to a limited extent.
• B) forget it.
• C) evaluate the cost.
• D) investigate it carefully.
• E) investigate it, as this is likely to reduce sampling error.

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Definitions:

Mode

The value that appears most frequently in a data set, representing the most common or popular outcome among the observed values.

Sample Variance

A metric indicating the spread or variation in a set of sample data, determined by dividing the sum of the squared differences from the mean by the total number of data points minus one.

Sample Variance

A measurement of the spread between numbers in a data sample, calculated by taking the mean of the squared deviations from the sample mean.

Squared Deviations

The squared differences between each observation and the mean, used in the calculation of variance.