Carolyn wants to bake some chocolate chip cookies. she wonders if shortening or butter produces a chewier cookie. usually she uses butter, but today she decides to conduct an experiment and bake two batches of cookies - one with shortening and one with butter. what is an example of an independent variable in this experiment? which is the control group, and which is the experimental group?

Heights of men on a baseball team have a bell-shaped distribution with a mean of 177 cm and a standard deviation of 6 cm. using the empirical rule, what is the approximate percentage of the men between the following values? a. 159 cm and 195 cm b. 165 cm and 189 cm a. 89% of the men are between 159 cm and 195 cm. (round to one decimal place as needed.) b. 89% of the men are between 165 cm and 189 cm. (round to one decimal place as needed.)