2. In-class activity Begin by asking each student in the class to estimate the length of the classroom. Specify that the length is the distance between the chalkboard and the opposite wall. (See Review Exercises 3–5.) On the same sheet of paper, each student should also write his or her gender (male female) and major. Then divide into groups of three or four, and use the data from the entire class to address these questions:

● Is there a significant difference between the mean estimate for males and the mean estimate for females?