Dr. Hawk works in an allergy clinic, and his patients have the following allergies: 69 are allergic to dairy products, 93 are allergic to pollen, 93 are allergic to animal dander, 30 are allergic to all three, 27 are allergic only to pollen, 12 are allergic only to dairy products, 40are allergic to dairy products and pollen. (Round your answers to one decimal place.) (a) What percent of Dr. Hawk's patients are allergic to animal dander? (b) What percent of Dr. Hawk's patients are allergic only to animal dander?

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.