Last year, Tucker Electronics decided to try to do something about turnover among assembly-line workers at its plants. It implemented two trial personnel policies, one based on an improved hiring policy and the other based on increasing worker responsibility. These policies were put into effect at two different plants, with the following results:

Do these data provide evidence that there is a difference between the turnover rates for the two trial policies?

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Plant 1 Plant 2 Increased Responsibility 900 Improved Hiring Workers in 800 trial group Tumover 0.05 0.09 proportion