(a) Briefly explain what you understand by phrase “homogeneity of the chloride level in a
water sample from a lake”
(b) Briefly explain how you would have done sampling in this study to obtain a set of
Apply the t-test at the 95% confidence level to determine if the chloride level from the top of the lake is different from that at the bottom.
Now use the paired t-test and determine whether there is a significant difference between the top and bottom values at the 95% confidence level.