Suppose you want to learn how often chemistry students atten…

Suppose you want to learn how often chemistry students attending a local college visit the student fitness center on campus. You interviewed students from the chemistry department who have an athletic build. Is the sample likely to be representative of the population of interest?

Suppose you’re evaluating the effect of using duck vs. chick…

Suppose you’re evaluating the effect of using duck vs. chicken eggs on the cooking time of a cake made using a standard recipe. You’ll be making four cakes with chicken eggs and four cakes with duck eggs and comparing the average of the four cooking times for each egg type. You have two different types of flour and two different sizes of cake pans. You know that both flour type and pan size can affect cooking time. Which of the following approaches would prevent the flour type and pan size from acting as confounding variables? I) Use one flour type to make all the chicken egg cakes and the other flour type to make all the duck egg cakes. II) Use the larger pans to make all the duck egg cakes and the smaller pans to make all the chicken egg cakes. III) Ensure that both flour types and pan sizes are used to make both the chicken egg cakes and the duck egg cakes.

A survey form regarding preferred breakfast food choices sol…

A survey form regarding preferred breakfast food choices solicits the following responses: I) Preferred hot beverage (coffee, tea, or cocoa) II) Preferred entrée (omelet, pancakes, or sausages) III) Amount of hot beverage consumed (cups) IV) Age of the respondent Which of these represents categorical data?