A graph where the horizontal axis is labeled "Arm circumference (mm)" and numbered 150, 200, 250, 300, 350, 400 and the vertical axis is labeled "Frequency" and numbered 0, 10, 20, 30, 40, 50.

There are vertical bars with bases and heights as follows: 200 to 220, 4, 220 to 240, 12, 240 to 260, 44, 260 to 280, 22, 280 to 300, 23, 300 to 320, 7, 320 to 340, 5, 340 to 360, 1, 360 to 380, 1, and 380 to 400, 1.

Under the horizontal axis, the mean minus two standard deviations is marked at 208 mm, the mean minus one standard deviation is marked at 239 mm, the mean is marked at 270 mm, the mean plus one standard deviation is marked at 301 mm, the mean plus two standard deviations is marked at 332 mm.

Back to Exercise: Arm circumference of students.

This page maintained by Martin Bland.

Last updated: 23 July, 2006.