Fig. 2

a: Linear regression between male student PEFR and standardized residual of the Height. The regression equation derived from the linear regression above (Fig. 2), used to predict male PEFR based on height, is: PEFR = 279.169 (Height of Student in m) —134.12. b: Linear regression between female student PEFR and standardized residual of the Height. The regression equation derived from the linear regression above (Fig. 2), used to predict female PEFR based on height, is as outlined below: PEFR = 318.32 (Height of Student in m) —195.69