MATH200 — Practice Quiz: Chapter 2 — 15 min  

Practice Quiz: Chapter 2

Work this like a regular quiz, using only your crib sheet. Give yourself a maximum of 15 minutes, then turn to the solutions and see how you did.

LOOK! Remember, you must show your work for full credit on any problems involving computation.

1(points: 4) Abigail asked a number of students their major. She found 35 in liberal arts, 10 in criminal justice, 25 in nursing, 45 in business, and 20 in other majors. What was the relative frequency of the nursing group, rounded to two significant figures?

 

histogram of data given in this question

2(points: 2) Bert asked his fellow students how many books they read for pleasure in a year. He found that most of them read 0, 1, or 2 books, but some read 3 or more and a very few read as many as 10. (He plotted the histogram shown at right.) What is the word or short phrase we learned to describe the shape of this distribution?

 

Class BoundsFrequencies, f  
470.0–480.015 
480.0–490.022 
490.0–500.029 
500.0–510.050 
510.0–520.038 

3(points: 6)  At right is a grouped frequency distribution. To make a histogram, you need one more column.
(a) Fill in that column and give it its proper header.
(b) Make a grouped frequency histogram on your TI-83/84.

4(points: 3) Name two types of graph that are suited to displaying categorical data.

 

Solutions to this practice quiz are available at http://www.tc3.edu/instruct/sbrown/stat/