how can i compute variation by sample mean in the goodness of fit test how to get sample variance how to calculate variance of a grouped data set sample variance calculation how i calculate sample variance how does the goodness of fit test calculate sample variance how to get sample variance from samples how do i calculate a sample variance how to calculate sample variance in goodness of fit sample variance from grouped data how to get sampling variance how to calculate variance how do I obtain sample variance in goodness of fit test how do you determine variance how to calculate a sample variance from data set how to calculate sample variance in gfe test how to calculate variance using a data set how to calculate variance from grouped data for goodness of fit test how to calculate variance on a grouped data set how to find variance of groupings