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InStat Tour: > Step 1, > Step 2, > Step 3, > Step 4, > Step 5
Quick Overview of GraphPad InStat:
Step 5: View the results
InStat presents the results using as little statistical jargon as possible.
Do the means of Column A and Column B differ significantly?
P value
The two-tailed P value is 0.0351, considered significant.
t = 2.532 with 8 degrees of freedom.
95% confidence interval
Mean difference = 4.600 (Mean of Column B minus mean of Column A)
The 95% confidence interval of the difference: 0.4109 to 8.789
Assumption test: Are the standard deviations equal?
The t test assumes that the columns come from populations with equal SDs.
The following calculations test that assumption.
F = 1.895
The P value is 0.2756.
This test suggests that the difference between the two SDs is not significant.
Assumption test: Are the data sampled from Gaussian distributions?
The t test assumes that the data are sampled from populations that follow Gaussian distributions.
This assumption is tested using the method Kolmogorov and Smirnov:
Summary of Data
| Parameter: |
Column A |
Column B |
| Mean: |
25.600 |
30.200 |
| # of points: |
5 |
5 |
| Std deviation: |
3.286 |
2.387 |
| Std error: |
1.470 |
1.068 |
| Minimum: |
23.000 |
27.000 |
| Maximum: |
31.000 |
33.000 |
| Median: |
25.000 |
30.000 |
| Lower 95% CI: |
21.520 |
27.236 |
| Upper 95% CI: |
29.680 |
33.164 |
Press Checklist at the lower left of the window to make sure that you have chosen an appropriate test and to review the meaning of each line of results.
The sixth step button shows a simple graph, suitable for getting the sense of your data and to spot errors in data entry. You cannot change or edit the graph, but can print it or copy it to the clipboard.
You don't have to follow the steps in order. When you edit data or change analysis choices, InStat instantly recomputes the results.
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