Permeation Sampling. Following are the data from Exercise 16.52 on experimentally obtained calibration constants for samples of compounds in each of four compound groups.

Aliphatic Aromatic Esters Alcohols hydrocarbons hydrocarbons 0.185 0.185 0.230 0.166 0.155 0.160 0.184 0.144 0.131 0.142 0.160 0.117 0.103 0.122 0.132 0.072 0.064 0.117 0.100 0.115 0.064 0.110 0.095 0.085 0.075

a. Use a 95% family confidence level.

b. Without doing any further work or referring to Exercise 16.52, decide at the 5% significance level whether the data provide sufficient evidence to conclude that a difference exists in mean calibration constant among the four compound groups. Explain your reasoning.