Present the data in table 2 graphically for the variables FEV1 percent predicted and FVC percent predicted. Repeat this for the same variables in table 3. Comment on your graphically representations

Table 3 Respiratory health of South African coal miners: lung function (mean, per cent predicted) for categories of cumulative dust exposure stratified by exposure status Table 3 Respiratory health of South African coal miners: lung function (mean, per cent predicted) for categories of cumulative dust exposure stratified by exposure status