Question

Please help
Will medal
the weight of strawberries follows a normal distribution with a mean weight of 12 grams and a standard deviation of 2.5 grams. if a strawberry is randomly selected what is the probability that the strawberry weighs less than 8.5 grams?
A .2119
B .1587
C .0808
D .2389

Answer 1

You can change the raw scores to z scores and then use a z table, or use a graphing calculator

Answer 2

here is a calculator online that can evaluate the probability
http://www.wolframalpha.com/widgets/view.jsp?id=98b17f068d5d9b7668e19fb8ae470841

Answer 3

you can plug in a large negative number for lower bound, like -1000

Answer 4

For some reason it doesn't show me the answer

Answer 5

@perl it's not working

Answer 6

@DanJS

Answer 7

@perl

Answer 8

it works

Answer 9

did you plug in mean = 12 , st dev = 2.5

Answer 10

Yes

Answer 11

lower bound, pick a very large negative number, -10000, upper bound is 8.5

Answer 12

ok i tried on a different computer and i got .0807567

Answer 13

correct

Answer 14

so c right

Answer 15

wow perl your very helpful @perl

Answer 16

so what we did was , we were trying to find
P ( X < 8.5 ) = P ( -oo < X < 8.5)

so I plugged in a very large negative number

Answer 17

thanks @chosenmatt

Answer 18

thanks @perl

Answer 19

:)

Answer 20

'-oo' means negative infinity