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lamlam1
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lamlam1 said:View attachment 240043
Using paired t test, how should I pair these results?
To calculate the delta values, should I use: downstream - upstream for both sep and apr ?
or upstream (sep) - upstream (apr) and downstream (sep) - downstream (apr) ?
Thanks
A paired t test is a statistical method used to compare the means of two related groups or conditions. It is often used in scientific research to determine if there is a significant difference between two sets of data.
To calculate delta values for a paired t test, you first need to find the difference between the paired observations. Then, you take the average of these differences and divide it by the standard deviation of the differences. This will give you the delta value, which is used in the t test formula to determine the significance of the difference between the two groups.
The purpose of calculating delta values in a paired t test is to determine the magnitude of the difference between the two groups or conditions being compared. This helps to determine if the difference is statistically significant or if it is due to chance.
The assumptions of a paired t test include: 1) the data is normally distributed, 2) the variances of the two groups are equal, 3) the observations within each pair are independent of each other, and 4) the difference between the two groups is normally distributed.
A paired t test should be used when the two groups being compared are related or paired in some way, such as before and after measurements on the same individuals. An unpaired t test should be used when the two groups are independent of each other, such as two different groups of individuals.