Question

PLZ HELP!!!

Answer 1

do you have a TI calculator?

Answer 2

i have this.

Answer 3

ok not sure if that has what we need, so we'll use wolfram alpha

Answer 4

the command we'll be using is the normalcdf command

the basic outline of the function is this

normalcdf(a,b,mu,sigma)

where...

a = left endpoint of area under curve
b = right endpoint of area under curve
mu = mean
sigma = standard deviation

Answer 5

so in this case, we will type in

normalcdf(3.3,20,3,0.245)

into the search box of wolfram alpha to get this page

http://www.wolframalpha.com/input/?i=normalcdf%283.3%2C20%2C3%2C0.245%29

the answer you want is the in the last row (second column) in the "probabilities section"

Answer 6

THANK YOU!!! i thought i was going to end up losing all my hair! lol

Answer 7

lol yw