Chapter 14.1, Problem 32E

Applying What You’ve Learned.

In Exercises 31 – 34, first group the data using an appropriate starting point and a class width of 10. Then determine the frequencies and construct a histogram similar to graph D (from Exercises 23 – 26).

Graph the data in Exercise 30.

30. Law School Aptitude Test scores. The following are the two lists of 40 LSAT scores. Group A studied in a traditional way and group B used a new online tutoring system to prepare for the exam. Make a back-to-back stem-and-leaf plot of the data. Does either group seem to score better?

A:	140, 154, 140, 123, 121, 158, 174, 155, 157, 127, 155, 154, 122, 164, 160, 142, 159, 154, 163, 141, 141, 129, 172, 142, 152, 146, 137, 173, 154, 149, 155, 144, 152, 149, 170, 151, 146, 149, 140, 146
B:	155, 144, 151, 136, 149, 165, 150, 153, 135, 142, 158, 173, 155, 151, 127, 142, 173, 140, 162, 147, 141, 137, 147, 161, 155, 165, 161, 177, 143, 126, 149, 164, 161, 144, 149, 164, 157, 173, 128, 147