Question

how do i sketch out a curvechatlong- 18 hours average 2 hours standard deviation talk-a-lot- 20 hours average 3 hours standard deviation

Answer 1

Given:

$1)\text{ Mean= 18 and standard deviation=2}$

Now, add and subtract standard deviation from mean.

$(18-2,18+2)=(16,20)$

The normal curve is,

$2)\text{ Mean= 20 and standard deviation=}3$