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Probability in Traffic Pathways

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Vehicles heading west on Front Street may turn right, left, or go straight ahead at Elm Street. The city traffic engineer believes that half of the vehicles will continue straight through the intersection. Of the remaining half, equal proportions will turn right and left. Two hundred vehicles were observed, with the following results. Can we conclude that the traffic engineer is correct? Use the 0.10 significance level.

Please show all work and answers in Excel format.

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The solution uses the 0.10 significance level to show probability in traffic.

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