A grocery store is selling different brands of chocolates numbering as follows: Cadbury - 20 pieces Hersheys - 20 pieces Goya - 20 pieces Patchi - 20 pieces Ferrero Rocher - 20 pieces Godiva - 20 pieces Lindt - 20 pieces Toblerone - 20 pieces Guylian - 20 pieces All the 180 chocolates are mixed and randomly placed inside a plastic container. At the end of the day, the same number of customers randomly picked and purchased all the chocolates from the bin disregarding the brands. Here is the tally of the cashier: Brands Cadbury Goya Ferrero Lindt Guylian Hersheys Patchi Godiva Toblerone Frequency 18 20 13 17 11 19 12 14 16 Is the purchase done by the customers unbiased? 1. Compute for the X2 2. What is the degrees of freedom 3. Compare the calculated and table values of X, at 5% level of significance 4. Is the result supports the hypothesis that the data is unbiased