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.

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 …

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.

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" …

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 …

Dec 25, 2024 · How to calculate standard deviation when only mean of the data, sample size, and t-test is available? Ask Question Asked 11 months ago Modified 11 months ago

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 …

However, when you calculate the standard deviation of a sample, you have to estimate the population mean that would normally be in the formula with the sample mean. Doing so …

0 There are better ways to estimate the standard deviation of the difference of two independent emperical datasets, when the probability distributions are unknown. You can use convolution, …

Aug 9, 2017 · How to calculate standard deviation of function with two variables Ask Question Asked 8 years, 4 months ago Modified 5 years, 10 months ago