1 | Data Type:
Specify the type of data for your analysis. The available options are:
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2 | Comparison:
Specify the type comparison you want to make for your data. The available options are:
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3 | Num Samples: Specify the number of samples(data sets) you are comparing. | ||||||||
4 | Hypothesis Test: Specify the specific hypothesis test you plan to use and the sample size will be determined for this test. | ||||||||
5 | Help Button: Click on this button to open the help file for this topic. | ||||||||
6 | Cancel Button: Click on this button to cancel all changes to the settings and exit this dialog box. | ||||||||
7 | OK Button: Click on this button to save all changes and compute the outputs for this analysis. |
1 | Null Hypothesis: Specify the null hypothesis (enter 0 if you are comparing more than 1 set of data). Note that for proportions, the null hypothesis should be between 0 and 1. |
2 | Alt Hypothesis: Specify the alternate hypothesis (less than, greater than, or not equal). The default setting is Not Equal. If you select either less than or greater than, then the software will perform a one-sided hypothesis test. |
3 | Confidence Level: Enter the confidence level required for your analysis. This controls your Type I or Alpha error (1 - Confidence Level). The default value for this is 95%. |
4 | Population Size: For certain types of analysis, the population size may not be very large. In these cases, we can specify the population size here so that the sample size calculator will take into account the limited size of the population when recommending the adequate sample size for analysis. For most cases, the population size is very large and in those cases you can use the character string INF to denote a very large population size. |
1 | Objective:
Specify the objective of this study. The available options are:
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2 | Sample Size: Unless you have specified an objective of determining the sample size, you will need to specify the number of samples you have available for your study. By default, this field is not enabled as the software will determine the minimum sample size you would need. Note that the minimum sample size is across all the samples (or data sets) that you are using for the comparison. | ||||||||
3 | Power of the Test: Unless you have specified an objective of determining the power of the test, you will need to specify the required power for your study. By default, this value is 90%. The value of power is also equal to 1 - beta (type II error). Hence, if you specify the power as 90%, then you are accepting that this study may have a Type II error of up to 10%. | ||||||||
4 | Delta (Differnce): Unless you have specified an objective of determining the minimum difference (delta), you will need to specify the minimum difference in samples you would like your study to detect. | ||||||||
5 | Standard Deviation: For continuous data type, you will need to specify the value of the standard deviation for your study. How much variation do you have in your data values. The more the variation (or standard deviation), the more the number of samples that would be required for your analysis. | ||||||||
6 | Hypothesis Statement: The statement about the specific hypothesis test that is being run is displayed here. Make sure you check this statement to make sure all your inputs are correct, if not you may need to adjust your analysis inputs. |
1 | Title: The system will automatically pick a title for your chart. However, if you would like to override that with your own title you can specify a title for your chart here. Note that this input is optional. |
2 | Sub Title: The system will automatically pick a subtitle for your chart. However, if you would like to override that with your own subtitle you can specify a subtitle for your chart here. Note that this input is optional. |
3 | X Label: The system will automatically pick a label for the x-axis. However, if you would like to override that with your own label for the x-axis you can specify a different label here. Note that this input is optional. |
4 | Y Label: The system will automatically pick a label for the y-axis. However, if you would like to override that with your own label for the y-axis you can specify a different label here. Note that this input is optional. |
5 | X Axis: The system will automatically pick a scale for the x-axis. However, if you would like to override that with your own values for the x-axis, you can specify them here. The format for this input is to specify the minimum, increment, and maximum values seperated by a semi-colon. For example, if you specify 10;20 then the minimum x-axis scale is set at 10 and the maximum x-axis scale is set at 20. If you specify 10;2;20, then in addition, the x-axis increment is set at 2. Note that this input is currently disabled and you will not be able to change this setting. |
6 | Y Axis: The system will automatically pick a scale for the y-axis. However, if you would like to override that with your own values for the y-axis, you can specify them here. The format for this input is to specify the minimum, increment, and maximum values seperated by a semi-colon. For example, if you specify 10;20 then the minimum y-axis scale is set at 10 and the maximum y-axis scale is set at 20. If you specify 10;2;20, then, in addition to minimum and maximum values, the y-axis increment is set at 2. Note that this input is optional. |
7 | Horizontal Lines: If you want to add a few extra horizontal reference lines on top of your chart you can specify the values here. The format for this input is numeric values separated by semi-colon. For example, if you specify 12;15 then two horizontal lines are plotted at Y = 12 and Y = 15 respectively. Note that this input is optional. |
8 | Vertical Lines: If you want to add a few extra vertical reference lines on top of your chart you can specify the values here. The format for this input is numeric values separated by semi-colon. For example, if you specify 2;5 then two vertical lines are plotted at X = 2 and X = 5 respectively. Note that this input is optional. |