This procedure gives almost similar results to the Pipestat!!!
- In our design Accommodation had three levels (Coll, consist, mp) and the Participants were nested inside the accommodation (one Participant could participate in only one condition or a between-subject design)
- These both were crosses with Distance (5 levels)
- All of these were again crossed with repetition of distances.
- The trick is to consider the nested variables as a single unit when describing the model in Minitab
- So the model for this design would be
- condition participant(condition)
- distance distance*condition distance*participant(condition)
- repetition repetition*condition repetition*participant(condition) repetition*distance repetition*distance*condition repetition*distance*participant(condition)
- It is much better to do it in Pipestat as it figures out the model itself rather than us specifying it.
My original motivation to study the model was to do post-hoc test REGWQ etc. in Minitab but it looks like it does not provide that test.
Importing .dat, .csv, xls file in Minitab
- File -> Open Worksheet [Choose .dat, .csv etc]
Removing empty cells in boxplot for between-subject design
- Double click the axis variable.
- Uncheck: “Include empty cells”.
- This shows only those ticks that has some data in it, which is very useful in case of between-subject design, as the participants are divided into different treatment groups.
Changing order of x-axis groups
Minitab picks a default ordering for x-axis groups (usually Alphabetical or Numeric ordering) If you want to change the order of group variables on x-axis (e.g. Low, Medium, High to Medium, Low, High):
- Select the column in the data window which represents the group in the graph.
- Right click and select Column->Value Order
- Select User-specified order
- Add the desired order, Click OK
- Any graph from now onward will follow that order
Changing color of x-axis groups
- The colors for groups can be selected in the dialog box at Tools->Options->Graphics-> Data View With Groups -> Symbol and Line Colors
- You can also change color for individual groups or sub-groups by double clicking on the bars and choosing appropriate attributes in the dialog box.
- Before double clicking, click just once to switch between different grouping variables.