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each insect captured, he identifies its family (one of the three) and its instar (first, second, third). 1. If Dr. Voelz wants to know how many first instar larvae have been found, this question requires us to calculate a a. Mean b. Conditional probability c. Count d. Marginal value 2. The explanatory variable in Question 1 above was a. Instar b. Family of caddisfly c. There are two response variables d. There is really only one variable in the question 3. If Dr. Voelz wants to estimate how many of the third instar larvae in the population are in the family Hydropsychidae, this question requires us to calculate a a. Mean b. Conditional probability c. Count d. Marginal value