Item

95% Confidenceinterval

Variation of estimated percentages

Iron 12 mm

(25953.48, 26411.48)

(1.19, 2.98)

Iron 8 mm

(26150.07, 26515.86)

(1.96, 3.39)

Iron 6 mm

(25661.42, 26329.05)

(0.05, 2.66)