Hi everyone,(adsbygoogle = window.adsbygoogle || []).push({});

I'm using the following formula to calculate sample skewness:

[tex] g_1 = \frac{m_3}{m_2^{3/2}}

= \frac{\tfrac{1}{n} \sum_{i=1}^n (x_i-\overline{x})^3}{\left(\tfrac{1}{n} \sum_{i=1}^n (x_i-\overline{x})^2\right)^{3/2}}\ , [/tex]

However, when I try excel on to calculate skewness I get a different results. For example this set:

1

1

1

1

1

1

1

9

9

I get: 1.33630621

Excel gets: 1.619847741

Is excel using a different formula, or am I doing something wrong?

Ted.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help with Sample Skewness

**Physics Forums | Science Articles, Homework Help, Discussion**