Question to test your Two Proportions knowledge

Question

A researcher wants to know if a new training method affects the accuracy of dogs in detecting a specific scent. In a test, 160160 trials were conducted with dogs using the new method, and the dogs correctly identified the scent in 110110 cases. In another group using the standard method, 130130 trials were conducted, and the dogs correctly identified the scent in 104104  cases. At the 0.050.05 significance level, test the claim using a hypothesis test that there is no difference in the rates of correct identification between the two methods.

Accepted Answer

z=−2.17z = -2.17, reject the null hypothesisThere is sufficient evidence at the 0.050.05 significance level to conclude that there is a significant difference in the rates of correct identification between the two methods.

Answer

z=0.53 z = 0.53, fail to reject the null hypothesisThere is sufficient evidence at the 0.050.05 significance level to conclude that there is a significant difference in the rates of correct identification between the two methods.

Answer

z=−2.17z=-2.17, fail to reject the null hypothesisThere is not sufficient evidence at the 0.050.05 significance level to conclude that there is a significant difference in the rates of correct identification between the two methods.

Answer

z=−1.13z=-1.13, fail to reject the null hypothesisThere is not sufficient evidence at the 0.050.05 significance level to conclude that there is a significant difference in the rates of correct identification between the two methods.

Two Proportions: Videos & Practice Problems