Solution for QID #97020: Samples of spring water were taken from two sources, presuma | StudyHelpMe

Samples of spring water were taken from two sources, presumably from the same spring. On  the basis of 6 analyses, the mean sodium content of the first sample is 3.92 ppm. Eight analyses of  a second sample gave a mean of 3.52 ppm sodium. The pooled analyses yielded a pooled standard  deviation of s = 0.20 ppm. Do the data indicate a difference between the sources of water at the  99% confidence level?