Suppose you were to collect data for the following pair of variables, ski diving: depth, visibility. You want to make a scatterplot. Which variable would you use as the explanatory variable? O depth O visibility Which variable would you use as the response variable? depth Ovisibility you expect to see a positive or negative association? O positive Would negative Oneither

1. A study comparing children's height to their reading level showed that 70% of children who were less than 48 inches tall had a reading level at or below 4th grade, while 80% of children who were 48 inches or taller had a reading level above 4th grade. There are 200 students total, and 110 of them are less than 48 inches tall.

In marketing children’s products, it is extremely important to produce television commercials that hold the attention of the children who view them. A psychologist hired by a marketing research firm wants to determine whether differences in attention span exist among advertisements for different types of products. A number of children under 10 years of age are asked to watch one 60-second commercial for one of three types of products, and their attention spans are measured in seconds. The results are shown in the accompanying table:   Type of Product Advertised Toys/Games Food/Candy Children’s Clothing 42 55 30 45 58 35 48 52 42 40 60 32 50 57 38 b). What type of error is possible and describe this error in terms of the problem.

Given the data set A = {0, 0, 12, 13, 14, 15, 16, 18, 22, 25, 30} which of the following is a true statement? O There are two modes for the data set. O The mean is greater than the median. O The mean and the median have the same value. O There is no mode for the data.