How to calculate standard deviation when only mean of the data …
Sep 6, 2023 · see below the answer by : Graipher allows calculating the standard deviation from the mean and the number of samples. The mean of this distribution is given by μ=np , where n …
How do I combine standard deviations of two groups?
Oct 26, 2018 · 0 expanding on the response of heropup: If you want to combine the weighted variances/standard deviations the formula is quite similar.
How do I calculate a weighted standard deviation? In Excel?
I want to find the standard deviation of the percentages, but weighted for their data volume. ie, the first and last data points should dominate the calculation.
Adding two (or more) means and calculating the new standard …
There are a load of discussions online about adding means and recalculating the standard deviation, but on none have I found answer to this question. I have two sub groups with mean …
How to derive the standard error of linear regression coefficient
another way of thinking about the n-2 df is that it's because we use 2 means to estimate the slope coefficient (the mean of Y and X) df from Wikipedia: "...In general, the degrees of freedom of …
statistics - incremental computation of standard deviation ...
This is actually computationally efficient, because you just need to count the number of samples, the sum of the samples, and the sum of the squares of each sample. Once you need to "read" …
How Can I calculate the standard deviation of a yes/no question?
Nov 29, 2020 · Is it possible to calculate the standard deviation of a single yes/no question? For example, 100 people took the survey and 60 of them chose "yes", 40 of them chose "no".
Is it possible to find the combined standard deviation?
3 I had the same problem: having the standard deviation, means and sizes of several subsets with empty intersection, compute the standard deviation of the union of those subsets. I like the …
How to calculate standard deviation of change in a data set?
Jul 11, 2021 · The standard deviation of the mean is known for pre and post treatment seperately. Is it possible to calculate the standard deviation for the change in score? Example data: …
Calculating standard deviation after log transformation
Oct 19, 2016 · But now how do I calculate the variance of the log-transformed datasets? It would seem I'd have to transform back because calculating it directly on the transformed data would …