For Exercises 19–22, test whether or not the proportions of successes are the same for all populations.

  1. State the hypotheses.
  2. Calculate the expected frequencies and verify that the conditions for performing the χ2 test for homogeneity of proportions are met.
  3. Find χcrit2 and state the rejection rule. Use level of significance α=0.05.
  4. Find χdata2.
  5. Compare χdata2 with χcrit2. State the conclusion and the interpretation.

Question 11.55

20.

Sample 1 Sample 2 Sample 3
Successes 50 50 100
Failures 200 210 425
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