# Homework Hints 14-2

### Note: Homework Hints are given only for the Level 1 and Level 2 problems.

However, as you go through the book be sure you look at all the examples in the text. If you need hints for the Level 3 problems, check some sources for help on the internet (see the LINKS for that particular section. As a last resort, you can call the author at (707) 829-0606.

On the other hand, the problems designated “Problem Solving” generally require techniques that do not have textbook examples.

There are many sources for homework help on the internet.

Algebra.help
Here is a site where technology meets mathematics. You can search a particular topic or choose lessons, calculators, worksheets for extra practice or other resources.
http://www.algebrahelp.com/

Ask Dr. Math
Dr. Math is a registered trademark. This is an excellent site at which you can search to see if your question has been previously asked, or you can send your question directly to Dr. Math to receive an answer.
http://mathforum.org/dr.math/

Quick Math
This site provides online graphing calculators. This is especially useful if you do not have your own calculator.
http://www.quickmath.com/

The Math Forum @ Drexel
This site provides an internet mathematics library that can help if you need extra help. For additional homework help at this site, click one of the links in the right-hand column.
http://mathforum.org/

Problems 1-8
There are many problems throughout the text labeled IN YOUR OWN WORDS. Just relax; do not be afraid to give your opinion. For the most part, these questions do not have “right” or “wrong” answers. You should spend about five minutes in answering each of these questions.
Problems 9-10
These problems are included to test your understanding of the terms standard deviation and variance.
Problems 11-18
As you are working these problems pay attention to the differences among the mean, median, and mode. See Example 1 for some help working these problems.
Problems 19-22
Create a box plot as shown in Example 7.
Problems 23-30
See Example 6 for the range and Example 8 for the standard deviation. It would be helpful to have a calculator when working these problems.
Problem 31
Look for a pattern to answer this question.
Problem 32
This counter-intuitive problem shows that you need to be careful when working with averages.
Problems 33-35
See Example 3.
Problems 36-37
See Example 3 for the mean, median, and mode, and Example 6 for the range.
Problems 38
See Example 3.
Problem 39-40
See Example 1.
Problems 41-44
Begin by finding the mean, median, and mode, and then answer the questions asked. Next, look at your answer and look at the graph. Can you deduce the answers to the questions without actually calculating the mean, median, and mode. You should look at Example 2 to help you with this reasoning.
Problem 45
It will help if you use a calculator for this problem. See Example 1.
Problem 46
a. See Example 5.
b. See Example 7.
c. See Example 8 for the standard deviation.
Problems 47-52
See Example 8; you will need a calculator to work these problems.
Problem 53
See Example 1 for the mean, median, and mode; Example 6 for the range; and Example 8 for the standard deviation.
Problems 54-55
You will need a pair of dice to work these problems. Roll the dice to gather the data for them. Use Example 1 for the mean, median, and mode; Example 6 for the range; and Example 8 for the standard deviation. Answers will vary each time you perform this experiment.
Problem 56
Use the definition of percentile to answer this question.