I have find the standard error for my data. I have three pieces of data and all of them are 25. What would my standard error be?
deviation= zero.
sqared=0
standard error: add up all the deviations from the mean, find the average deviation, square it.
To calculate the standard error for a sample with three data points, follow these steps:
1. Find the mean (average) of the data values. In this case, all three data values are 25, so the mean is also 25.
2. Calculate the difference between each data value and the mean. In this case, the differences are all zero since all the values are the same.
3. Square each difference. For this data set, squaring the differences will still result in zero.
4. Sum up the squared differences. Since all the squared differences are zero, the sum will also be zero.
5. Divide the sum of squared differences by the number of data points minus one. In this case, you have three data points, so the denominator is 3 - 1 = 2.
- 0 divided by 2 equals 0.
6. Take the square root of the result from step 5. The square root of 0 is still 0.
Therefore, for your data set with three data points of 25, the standard error is 0.