Stastistic Question 4

Question Four   Kathambi and company Ltd has an identical toilet soap type, but in three different wrappings.  This soap is displayed for sale in three city supermarkets for five months.  Use ANOVA to investigate whether or not the soap sales for each of the wrapping are equal; at 95% confidence level, using the data tabulated below   WRAPPING ONE TWO THREE 87 78 90 83 81 91 79 79 84 81 82 82 80 80 88