# Math Help - measures of spread

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

2. 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?

3. Whew, hey thanks for your help! =)