How can we get new standard deviation while calculating mean difference (subtracting one mean from another, having different SDs)?

Greetings, Let's say I have a mean value X with SD 1.5 (i.e. X ± 1.5) and another mean Y with SD 1.3 (Y ± 1.3). If I have to subtract those mean values, how can I do it for Standard deviation?...

07 December 2022 1,417 1 View