Common Questions and Answers





Q. How do I change the display units for the graphs?


A. Graph units are set with Options | Units. Some methods, such as the Eden-Hazel method, display portions of graphs in metric only, because of the complicated combination of units.



Q. I excluded some data for an analysis. How do I prevent the excluded data from appearing on the graph when printed?


A. To prevent the display of excluded data, go to Options | Graph Symbols. For the symbol for excluded data points, select None. Excluded data will not be displayed.





Q. What is the Current Step?


A. The Current Step is the step for which you are currently adjusting the data to get a best fit line. The line for the current step will be a different color that the other steps. The Current Step is selected using the Next Step or Prev Step button on the control panel or main window tool bar.



Q. Which screens allow me to adjust data.


A. Data adjustments are made only during the Eden-Hazel Part 1 screen, the Set Step Drawdown screen, or the Birsoy-Summers screen. When these screens are displayed, a small control panel will be shown to allow you to make adjustments to the data.



Q. How can I adjust the data for each step to when determining the best fit analysis.


A. Make that step the Current Step. To include or exclude data points from the analysis, use More Trials or Less Trials from the control panel. Data can only be included or excluded from the beginning of the step. Data included in the best fit analysis can be shown in a different color and with a different symbol from data excluded from the analysis.



Q. On the Eden-Hazel Part 1 screen, the lines don't look at all like they are fit to my data. What is the problem?


A. When this screen is first displayed, the lines will not likely look as they fit your data points. You may need to:

1. Make sure that you have made each step the "Current Step." Press Next Step on the control panel until you reach the last step.

2. If it still does not look good, subtract the first few points in each step from the best fit analysis. Do this by making each step the current step, and then pressing the Less Trials button on the control panel a few times to reduce the number of points. Then repeat number 1 above.

3.  If this still doesn't work, see if one of the steps (most likely the first step) is likely to be influence the data in a bad way. Exclude the step from the analysis by making it the Current Step, and pressing the Exclude Step button on the control panel. Then repeat numbers 1 and 2.



Q. On our step test, one step has bad data. Should I enter this data?


A. Yes. Enter all data recorded for the test. When you perform the analyses, exclude the bad step by making it the "Current Step," and pressing Exclude Step on the control panel. It will not be included in the final analysis.



Q. I have a data set with six steps. For each test method, the data looks like a good fit on the first screen, but on the second screen, all the points are close to being in a straight line except for one. This rogue point appears to have significantly altered the results. How can I eliminate this point?


A. Go back to the first screen (either Eden-Hazel Part 1 or Set step Drawdowns) and make the rogue step the "Current Step." Press Exclude Step on the control panel to exclude that step from the analysis. Data in that step will now be displayed with the symbol and colors for excluded data. Rest your match lines and proceed to the second screen. Now the rogue step will appear on the graph using the symbol and color of excluded points, but it will not be included in the best fit analysis.