An article by D. Schaefer et al. reported on a long term study of the effects of hurricanes on tropical streams of the Luquillo Experimental Forest in Puerto Rico. The study shows that Hurricane Hugo had a significant impact on stream water chemistry. The following table shows a sample of 11 ammonia fluxes in the first year after Hugo. Data are in kilogram

Determine the mean

Determine the sample standard deviation

Determine the range

94	65	144	180
115	55	154	88
40