# Standard deviation

#### TruBluStu

##### New Member
I just read this in an addiction paper
"The mean total amount of methamphetamine consumed over this 30-day period among those
who used any was 0.21 g (SD=0.30) per using day"

Because the SD is greater than the mean, can I assume that the distribution was positively skewed?

#### GretaGarbo

##### Human
Well yes.

But it can't be negative. Such distribution are often skewed to the right.