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Thursday, October 13, 2011

OGT Practice Question

Local residents have requested a traffic light at the intersection of Polk Road and Vine Street. They claim that the intersection has become unsafe for their children due to the high volume of drivers using these roads as shortcuts during rush hour from 4 p.m. to 6 p.m.

In response, the street department installed a device that would count cars going through the intersection. The device counted the total number of cars each day for a two-week period. The department used the results to determine the average number of cars passing through the intersection each day. They decided the number was normal for an intersection with no light, and refused the residents’ request.

In your Answer Document, explain how the residents can claim that the method the department used to collect the data does not provide valid information for evaluating their request.

Explain how the department’s method can be altered to provide more valid data. (2 points)

7 comments:

  1. The department didn't count how many cars were going through during just rush hour, that's what the residents were complaining about. If they had counted the cars just from 4 to 6 pm they could have seen that a majority of the cars of that day had passed through at that time.

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  2. the department could at least put up a stop sign or something, make the street a little more safer for kids instead of not doin anything and ignoring there requests.

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  3. the residents can claim that the method the department used to collect the data does not provide valid information for evaluating their request because they will still think that its unsafe for the children because all of the traffic without a traffic light . They also counted for the whole days, not just for rush hour and thats what the residents were complaining about

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  4. 1.) The device was active all day instead of just at the times the residents listed was unsafe. So the average number of cars was altered, due to the number of cars that went through the intersection during the rest of the day.

    2.) The data can be corrected by recording the average number of cars that pass through the intersection between 4 p.m. to 6 p.m. and then comparing it to the number of cars that would normally got through an intersection. Then they could make a more appropriate decision on whether or not to install a light

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  5. they did not think of the amount of cars going throw after rush hour.they don't think of what can happen at night.

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  6. they need to put a metal thing in the middle of the road that every time the cars wheels hit it and go over it it will count for them

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  7. Hello Everybody,
    I enjoyed reading all of your responses. Please go back and read Malikki's, Dawn's, and Travis' responses. They all were very direct and contained relevant information.

    Thanks,
    Ms. Straight

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