**Problems 1-4**

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 5-10**

See Example 1.

**Problems 11-22**

Use Table 14.9 and symmetry to find the* z* value.

**Problems 23-24**

See Example 2.

**Problem 25**

The standard deviation of a normal distribution is the standard deviation, the number sigma. From the last section, we find know the variance is the square of the standard deviation.

**Problem 26**

A cumulative frequency is the sum of all preceding frequencies in which some order has been established. See Example 1.

**Problem 27-28**

See Example 3.

**Problem 29**

The variance is the square of the mean.

**Problem 30**

A cumulative frequency is the sum of all preceding frequencies in which some order has been established. See Example 1.

**Problems 31-34**

These problems give you some practice in identifying distributions. See Example 6.

**Problems 35-38**

See Example 3.

**Problem 39**

See Example 1.

**Problems 40-41**

These problems are included to test your understanding of the term skewed distribution.

**Problems 42-45**

See Example 4.

**Problem 46**

Use Table 14.9 and Example 4.

**Problems 47-48**

See Example 2.

**Problem 49**

Use Table 14.9 and Example 4.

**Problem 50**

See Example 2.

**Problems 51-52**

The standard deviation is the square root of the variance; see Example 2.

**Problem 53**

Use Table 14.9 and Example 4.

**Problem 54**

See Example 3; the shirt sizes are the same as “grades.”

**Problems 55-56**

See Example 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/

**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/