## Math 113 - Exam 1 Study Guide (Chapters 1 - 2)

1. Vocabulary: A definition is given. Match it to the term best defined. Sixteen terms. Not all terms are used. Know class marks, class boundaries, class limits, inter-quartile range, mean, median, midrange, mode, non-sampling error, parameter, population, qualitative data, quantitative data, range, sample, sampling error, skewed distribution, standard deviation, statistic, symmetric distribution, variance.
2. A news article is given. Read the article and answer questions based on it. Know the types of sampling, self-selected surveys, sample size, how to convert a frequency to a percent, and why a large sample isn't necessarily a good thing. Read the Gallup Organization introduction on how polls are conducted for more information.
3. Identify each variable as discrete or continuous. Four parts.
4. A news article is given. Read the article and answer questions based on it. Know the types of sampling, how to find the number of people given the percentage, how to apply a margin of error to a sample, and list types of non-sampling error listed in the article.
5. A news article is given. Read the article and answer questions based on it. Find the abuse of statistics in the article and know the difference between discrete and continuous random variables.
6. Know which measures of central tendency or dispersion is most resistant to change and which are affected by extreme values. Mark all correct responses. (MC).
7. Know which measures of central tendency or dispersion use all the data values and which one's don't. Mark all correct responses. (MC)
8. Determine which type of sampling (random, systematic, stratified, cluster, convenience) is used. Five parts.
9. You will be given the mean, median, range, standard deviation, and variance for a sample. A transformation is then applied to the data from the sample, and you need to indicate what the new values of the statistics are. Two parts. This is from the lab.
10. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Six parts.
11. The minimum, maximum, and desired number of classes is given. Find the class width. (MC)
12. The minimum, maximum, and desired number of classes is given, find the limits for the first class. (MC)
13. The class limits are given for a class. Find the class width. (MC)
14. Given sample data, use the calculator to find the mean, standard deviation, variance, and median. Create a box plot. You may use Statdisk or your calculator. If you use the calculator, you will need to know how to perform one variable statistics with your calculator with an xlist, but a frequency of one.
15. Given a frequency distribution, use the calculator to find the mean, standard deviation, variance, and median. Find the modal class. You will need to know how to perform one variable statistics with your calculator with an xlist and frequency. You will also need to know how to find the class mark.
16. Given the maximum value, the minimum values, and the number of classes to create, find the class width, a suitable lower class limit for the 1st class, the upper limit for the first class, and the lower boundary for the first class. There are more than one lower limits which are possible, but you only need to give one. The answers for the rest of the problem will be based upon the answer you give for the lower class limit.

### Notes:

• None of the problems are directly from the text.
• References to data obtained from the Internet are given on the test. They may be ignored for purposes of the exam.
• Be sure to bring your calculator.
• Problems with (MC) are multiple choice.

#### Points per problem

 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Total 16 10 4 13 6 2 2 5 10 6 2 2 2 10 10 100