Calculate the Chi-Square (2) statistic. First, copy the expected values that you just calculated into the column labeled "E" in the table below. Second, fill in each column follow the instructions in the column headers to calculate the 2 statistic for each cell. Third, add the cell 2 to calculate the overall 2 statistic (and record it in the space provided Observed (O) Expected (E) O - E (O - E)2 ( ) Vax Only Neg. 75 Vax Only Pos. 20 Boosted Neg. 50 Boosted Pos. 5 Sum () 150 N/A N/A N/A