Notes

Mean

• a.k.a Simple Average

• Population μ , Sample x̄

• Finding the mean

  • Adding up components then dividing by number of components

    

• Easily affected by outliers

• The mean is not enough to make definite conclusions.

Median

• Middle number in an ordered dataset
• The median is the number at position (n+1)/2 in the in-ordered list.

Mode

• Most common value
• If everything appears once, then there is no mode.

There is no best method, but using only one method is the worst.

Course Materials

2.7.+Mean,+median+and+mode_lesson.xlsx