Math of Geography Flashcards
1
Q
why is calculating standard deviation useful?
A
- useful in determining vallitidy in the data set
- a number above 1 means there is a large spread of data around the mean
> not a lot of clustering
> many extreme values - standard deviation is able to show the extent of fluctuations in standard deviations over time
> able to compare data sets easily
2
Q
how to calculate percentage change
A
difference ( final - initial) / initial number x 100
3
Q
how to calculate percentage decrease
A
initial - final/ initial x 100