In a study of redlgreen colour blindness, 500 men and 2100 women are randomly selected and tested. Among the men, 5 have red/ green colour blindness. Among the women, 8 have red/green colour blindness (based on data from USA Today). Suppose the 95% Cl is (7.796%, 13.490%), then the margin of error in estimating the difference in proportion of red/green colour blindness in men to women is Express the answer to 3 decimal places. Examples of answer formats: 0.012, 5.678. 0.789