Suppose You Have Data on the Number of Accidents at a Certain

question 27

Multiple Choice

Suppose you have data on the number of accidents at a certain inter

• A)A bar graph with one bar for each year of data available; the bars are an equal distance apart.
• B)A line graph with the years from 1960 through 1990 marked off in equal increments and dots on the line graph representing the number of accidents for the years for which data are available.The dots are connected with lines.
• C)A pie chart with a slice for the percentage of accidents occurring in each of the four years for which data is available.
• D)Any of the above.

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Definitions:

Randomized Block Design

A statistical experimental design that groups subjects into blocks to account for variability among them and randomly assigns treatments within each block.

Sum of Squares

A measure used in statistics that quantifies the variation or dispersion of a set of data points.

Two-way ANOVA

A statistical test used to determine the effect of two nominal predictor variables on a continuous outcome, assessing interaction between the two factors.

Treatments

In experimental design, treatments are the different conditions or interventions applied to study subjects to observe effects on outcomes.