# Exam 1 Study Guide: The Basics

1. Identify whether the situation described is a descriptive statistic or an inferential statistic. Five parts. Look at homework 1.
2. Identify whethere the variable is categorical or numerical. Five parts.
3. Identify the level of measurement described. Ten parts. Look at homework 2.
4. Interpret the graph. Four parts. Look at homework 3.
5. Interpret the graph. Four parts. Look at homework 3.
6. Complete the data set so that it satisfies the given characteristics. You'll need to know the definitions of mean, median, and mode to do this. For example, if the mean is 20 and the first three numbers are 10, 12, and 45, what is the fourth number? Three parts.
7. Create a graph. You should know how to create pie charts, bar charts, histograms, box plots, and stem and leaf plots.
8. A set of data is given. Find something similar to a five number summary for the data.
9. Look at a histogram where the bars are one standard deviation wide. Determine the percent of the data that lies within one, two, and three standard deviations of the mean and whether or not 68-95-99.7 rule applies. Chebyshev's Rule is stated, see if your data follows that rule. Look at questions 3 and 4 on classroom activity 1.
10. The mean, median, range, standard deviation, and variance for a dataset are given. Determine what those statistics will be after the indicated transformation is applied. Six translations. Look at homework 5.
11. Given a small set of data values, find the mean, median, mode, midrange, range, variation, variance, and standard deviation. Look at homework 4 question 1, and classroom activity 2.
12. Find the measures of spread using the shortcut formula for variation. The number of values, the sum of the values, and the sum of the squares of the values are given. You will need to know the shortcut formula, it is not given on the test. Look at homework 4 question 2.
13. Use minitab to find the descriptive statistics for a data set using Stats / Basic Statistics / Display Descriptive Statistics. Be sure to know when to use the "by variables" and when to leave it blank. Know how to go into the statistics button and turn on or off certain statistics. Look at classroom activity 1.
14. Use minitab to follow the instructions and the answer the questions based on the results. This is similar to the last question on classroom activity 1.

## Notes

• You will need a calculator.
• No formulas are provided on the test. Memorize anything you need to answer the questions.
• There are two parts to the test.
• The first part, questions 1-12, are to be worked individually without a computer.
• The second part, questions 13-14, require Minitab and may be worked with a partner (you may work alone if you choose).
• Your group may decide which part of the test you would like to work first.

## Points per problem

 # Pts 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Total 10 10 20 8 8 9 6 5 8 24 16 6 10 10 150