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

1. Vocabulary: A definition is given. Match it to the term best defined. Fourteen 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, standard deviation, statistic, symmetric, variance.
2. 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, and why large samples aren't necessarily a good thing. Read the Gallup Organization introduction on how polls are conducted for more information.
3. A news article is given. Read the article and answer questions based on it. Know the types of sampling and how to apply a margin of error to a sample.
4. A news article is given. Read the article and answer questions based on it. Know the types of sampling and possible abuses of statistics. Know what a self-selected survey is and the difference between discrete and continuous variables.
5. Know which measure of central tendency is most resistant to change and which is most affected by extreme values.
6. Know which measure of central tendency uses all the data values and which one's don't.
7. A news article is given. Read the article and answer questions based on it. Know the difference between an observational study and experiment, be able to define the population the sample was taken from, find the abuse of statistics.
8. Determine which type of sampling (random, systematic, stratified, cluster, convenience) is used. Five parts.
9. Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Four parts.
10. A news article is given. Read the article and answer questions based on it. Know discrete vs continuous, levels of measurement.
11. 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.
12. Given sample data, use the calculator to find the mean, standard deviation, variance, and median. Create a stem and leaf plot and a box plot. Six parts. You will need to know how to perform one variable statistics with your calculator with an xlist, but a frequency of one.
13. Given a frequency distribution, use the calculator to find the mean, standard deviation, variance, and median. Find the modal class. Five parts. 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.
14. 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.

#### Points per problem

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