UBC Building Signs Narrative

question 126

Short Answer

UBC Building Signs Narrative
A researcher at University of British Columbia (UBC) wanted to determine whether different building signs (building maps versus wall signage) affect the total amount of time visitors require to reach their destination and whether that time depends on whether the starting location is inside or outside the building. Three subjects were assigned to each of the combinations of signs and starting locations, and travel time in seconds from beginning to destination was recorded. A partial computer output of the appropriate analysis is given below:
ANOVA Table
-Refer to UBC Building Signs Narrative. In order to determine the critical value of the F ratio against which to test for interaction between levels of factor A and levels of factor B, which numerator of df and which denominator of F should we use?

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Definitions:

Correlation Coefficient

A measure of the strength of the linear relationship between two variables.

Squared Residual

The square of the difference between an observed value and the value predicted by a model, used in regression analysis to measure error.

Mean Square Error

The unbiased estimate of the variance of the error term s2. It is denoted by MSE or s2.

Estimated Regression Equation

An equation generated through regression analysis that predicts the dependent variable based on the values of independent variables.