1. The problem statement, all variables and given/known data The logarithm of an object changes between days according to a normal distribution with median 0,00065 and std dev 0,0038. Calculate the mean and std dev after 249 days for the real and logarithmic scales. 2. Relevant equations Standard standard deviation as far as I am aware. This type of problem is unbeknownst to me and my textbook. 3. The attempt at a solution I know the formula for the real scale, but I don't know what they mean by a logarithmic scale. Do they mean to just take log() of the std dev for the real scale?