Carry out an appropriate test of significance to see whether the Cameroon water filters (population) tend to fl ow at a rate different than 1,000 mL/min, or is an average of 1,000 mL/min plausible? State your hypotheses, 95% confidence interval, p-value, and conclusions.

Let’s look at one last research question. As a general rule, the flow rate of a water filter in good working condition should be around 1,000 mL/min. Let’s test to see whether these water filters had an average flow rate that is significantly different than 1,000 mL/min. (See data set Ecoli-flow.)