Vehicles heading west on Front Street may turn right, left or go straight ahead at elm street. The city traffic engineer believes that half to the vehicles will continue straight through the intersection. On the remaining half, equal proportions will turn right and left. Two hundred vehicles were observed,with the following results. Use the .10 significance level. Can we conclude that the engineer is correct?
Chart: Frequency straight 112, right turn 48, left turn 40
Straight Right Left
Observed 112 48 40
Expected 100 50 50
Significance level (Alpha) = 0.10.
Degrees of freedom (DF) = ...
This solution looks at a traffic analysis problem using Chi-Square.