what is the standard deviation of weight in r what is the normal distribution of the mean rate r how to code standard deviation in rat weights what is standard distribution of rat weight in r what is the distribution of standard deviation of rat weight r standard deviation sd standard deviation in r and mean in rat weight how to get standard deviation of rat test what is the normal distribution for weight normal distribution of rat weight what is a normal distribution in r for standard deviation which is a standard deviation for a normal distribution r what is normal distribution for rat rat weight what is the standard deviation in r based on mean rate weight what is the standard deviation of the rat normal distribution of rat weight r normal distribution of rate weight r normal distribution for weight r average mean standard deviation r normal distribution of rat weight