Do these data indicate a significant difference between the treatments at the .05 level of significance?Calculate the test by hand.
A researcher tests if the introduction of fluoride to the drinking water will significantly reduce the average number of cavities among children. Last year the average number of cavities was μ = 2.32, with σ = 0.46. This year fluoride was introduced. Thirty six children are sampled, and have an average of 2.07 cavities. Using […]