• October 14th 2008, 05:44 PM
perron
This is from a text...

Height(cm) l deviation, x-mu l $(x-mu)^2$
183...........18.....................324
165............0......................0
148............-17...................289
146............-19...................361
181............16.....................256
178.............13....................169
154.............-11...................121
Total: 1155.....0....................1520

...and I don't understand how you get the answers from the middle column
• October 14th 2008, 05:47 PM
mr fantastic
Quote:

Originally Posted by perron
This is from a text...

Height(cm) l deviation, x-mu l $(x-mu)^2$
183...........18.....................324
165............0......................0
148............-17...................289
146............-19...................361
181............16.....................256
178.............13....................169
154.............-11...................121
Total: 1155.....0....................1520

...and I don't understand how you get the answers from the middle column

x represents height. Have you calculated the value of mu, the mean height?
• October 15th 2008, 03:24 PM
perron
Whew, hey thanks for your help! =)