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Exercise 3717. Points 2, theme: Chi-squared Exercises

Open exercise
40 random persons having voting right were questioned in Tartu, 30 of them intended to participate in elections. The same numbers in Tallinn were 70 and 40.
  1. How surely (in percentages) can we conclude that participation will be different in these cities?
  2. Is this certainty enough for a scientific inferrence?


You shold make a 2 x 2 condingency table before using chi squared test because the ferquency of negative answers is directly not mentioned in the exercise text.
Chi squared test in the SDC.
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