2) The calcium content of a powered mineral substance was analyzed five times by each of three methods, with similar standard deviations. The averages are presented in the Table below i l 0.0279 0.0276 0.0270 0.0275 0.0281 0.0267 0.0267 0.0279 l 0.0282 0.0278 l 0.0283 Use an appropriate test to compare the three methods of measurement. State the null and alternative hypotheses and indicate if there is, or is not, sufficient evidence to reject the null hypothesis