Minitab Notes for Activity 3

Creating the Worksheet

You will be entering your own information for this activity.

  1. Label five empty columns as "game", "first roll", "initial result", "final result", "rolls". You're free to call them something else, but you'll need to adjust the instructions accordingly.
  2. Enter the data into the worksheet.
  3. Go File / Save Project As
  4. Move through the filesystem to R:
  5. Change to your section number
  6. Change to the act3 folder
  7. Type a name that is unique to your group
  8. Click OK

From now on, when you need to work with the project, open the one for your group.

Creating Marginal Distributions (Questions 4, 5, and 6)

Although a number, the first roll is actually a categorical variable as it doesn't make any sense to compare a roll of 4 with a roll of 9. The results are also categorical variables.

  1. Choose Stat / Tables / Tally
  2. Select the "first roll", "initial result", and "final result" variables.
  3. Check the box beside Percents so that both Counts and Percents are displayed.
  4. Click OK

Summarizing the Data (Question 7)

  1. Choose Stat / Basic Statistics / Display Descriptive Statistics
  2. Double click on the variable "rolls"
  3. Click on the Graphs button and check the Graphical Summary box. Click OK to return to the main screen.
  4. Click OK

The "sum" box on your activity isn't given by Minitab, but it can be found by multiplying the mean by the number of trials (36). The variance can be found by either squaring the standard deviation or looking on the graphical summary screen.

Use the histogram from the graphical summary screen to talk about the shape of the distribution.