Fed-Kun's army
- Joined
- Mar 3, 2018
- Messages
- 50
@elixir6
If you don't know what SD's are, basically, 99.73 % of the “data points” (here, single measurements of individuals) are within the range [mean -3 SD to mean +3 SD], 95.44 % are within [mean - 2 SD to mean +2 SD], 62.27 % are within [mean -1 SD to mean +1 SD]. Alternatively: 0.13 % are above +3 SD; 2.28 % are above +2 SD; 15.87 % are above +1 SD; 50 % are above the mean; 84.13 % are above -1 SD; 97.72 % are above -2 SD; 99.87 % are above -3 SD.
So just follow the lines. For example, getting means for age 10: follow the line from the 10 up until it crosses the mean weight line at about 31.5 kg, and the mean height at about 137.2 cm.
Reading the chart, -3 SD for 16 year-olds is 142 cm. There are about 520 000 Japanese 16 year-old girls. Thus about 700 of them are shorter than 142 cm – assuming the data is accurate (and my calculations – my stat course was a long time ago).
Read the numbers, my friend! Just follow the grid: left side height, right side kg, bottom age. The upper collection of lines is height, lower collection is weight. The middle line in each is the mean, with standard deviations (SD) above and below.As someone who can't read the language, how should I be reading the charts you linked? #DataIsBeautiful
If you don't know what SD's are, basically, 99.73 % of the “data points” (here, single measurements of individuals) are within the range [mean -3 SD to mean +3 SD], 95.44 % are within [mean - 2 SD to mean +2 SD], 62.27 % are within [mean -1 SD to mean +1 SD]. Alternatively: 0.13 % are above +3 SD; 2.28 % are above +2 SD; 15.87 % are above +1 SD; 50 % are above the mean; 84.13 % are above -1 SD; 97.72 % are above -2 SD; 99.87 % are above -3 SD.
So just follow the lines. For example, getting means for age 10: follow the line from the 10 up until it crosses the mean weight line at about 31.5 kg, and the mean height at about 137.2 cm.
Reading the chart, -3 SD for 16 year-olds is 142 cm. There are about 520 000 Japanese 16 year-old girls. Thus about 700 of them are shorter than 142 cm – assuming the data is accurate (and my calculations – my stat course was a long time ago).