A Veterinarian Wants to Know If Pit Bulls or Golden

question 86

Multiple Choice

A veterinarian wants to know if pit bulls or golden retrievers have a higher incidence of tooth decay at the age of three. The veterinarian surveys 120 three-year-old pit bulls and finds 30 of them have tooth decay. The veterinarian then surveys 160 three-year-old golden retrievers and finds 32 of them have tooth decay. Number the population of pit bulls and golden retrievers by 1 and 2, respectively. At the 10% significance level, can the veterinarian conclude the proportion of pit bulls that have tooth decay is different than the proportion of golden retrievers that have tooth decay?

• A) No, because the confidence interval contains zero.
• B) Yes, because the confidence interval contains zero.
• C) No, because the confidence interval does not contain zero.
• D) Yes, because the confidence interval does not contain zero.

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