Question 4 A dietitian wishes to sees if a person's cholesterol level will change if the diet is supplemented by a certain mineral. Six subjects were pretested and then took the mineral supplement for six-week period. The results are shown in the table Subject 2 3 4 5 6 Before 210 235 208 190 172 244 After 20 230 210 188 173 238 Is there significant evidence to assume that there will be a decrease in the cholesterol level after taking the mineral supplement? Test at 5% significance level. (10 marks)