The ANOVA Test Performed for Determined That Not All Mean

question 73

Multiple Choice

The ANOVA test performed for determined that not all mean commute times across the four cities are equal. However, it did not indicate which means differed. To find out which population means differ requires further analysis of the direction and the statistical significance of the difference between paired population means. Fisher 95% confidence intervals are shown below. How many pairs of cities show a significant difference in average commute times to work?

• A) 2
• B) 3
• C) 4
• D) 6

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Definitions:

Validity

The extent to which a test or instrument measures what it is supposed to measure.

Predictive Validity

The extent to which a score on a scale or test predicts future performance on a related outcome.

Culture Bias

The tendency to interpret or judge phenomena by standards inherent to one's own culture, potentially leading to misunderstanding or prejudice.

Sampling Bias

A statistical bias that occurs when the sample chosen is not representative of the population being studied, potentially leading to distorted findings.