A survey found that in a sample of 75 families, 26 owned dogs. A survey done 15 years ago found that in a sample of 60 families, 26 owned dogs. At α = 0.05 has the proportion of dog owners changed over the 15-year period? Find the 95% confidence interval of the true difference in the proportions. Does the confidence interval contain 0? Why would this fact be important to a researcher?
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.

  • CreatedSeptember 02, 2015
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