what temporal resolution for time series how to use the difference of mean in time series do concentrations in ponds how do you calculate t-value for an annual pond concentration? when are do levels reported how do you determine the difference between a monthly and an actual pond concentration how do you compare do to annual average difference of means tests what time series would you use the t test to find the difference average of the pond monthly do in ponds is measured by why is the temporal resolution of the t-test important average of daily and monthly do levels for pond how to calculate difference of means what temporal resolution for time series significance test why do we use the decadal measure as the mean of the annual mean does the daily average of a pond vary how to compare do levels what does an annual mean test for do mean how does difference of mean testing work