The article Origin of Precambrian Iron Formations Econ Geology 1964 1025 1057 reports the follow ing data on total Fe for four types of iron formation 1 carbonate 2 silicate 3 magnetite 4 hematite 1 27 8 20 5 25 2 2 26 3 34 0 29 5 26 2 36 5 33 1 3 28 1 25 3 24 0 17 1 34 0 26 2 26 8 27 5 29 5 34 1 32 9 27 0 20 5 20 2 23 7 294 30 0 30 3 36 3 28 0 31 3 23 7 24 9 27 9 35 6 314 25 5 34 1 Carry out an analysis of variance F test at significance level 01 and summarize the results in an ANOVA table