Question

Hello,
http://img856.imageshack.us/img856/9470/35e114b40f474ab79930144.png
Is the exercise I am on, I have solved A, yet segment B is something which my textbook has not covered previously, could someone please explain this to me. Thank you so much!

Answer 1

If you dont wish to open an external link I have uploaded it here:

Answer 2

ok, that is one annoying question

Answer 3

you matched each graph with the proper mean and Standard deviation?

Answer 4

yes :)

Answer 5

what color is mean -1

Answer 6

Histogram A: \[\mu = -1 , \sigma=3\] Histogram B: \[\mu = 2 , \sigma=0.5\] Histogram C: \[\mu = 1 , \sigma=1\]

Answer 7

a proportion is just a fraction. top of fraction is frequency at the mean, bottom is the frequency of "standard deviation" moves to the right of the mean number

Answer 8

So the answer to one histogram A's proportion would be \[\frac{ 30 }{ 3 } = 10\]

Answer 9

30/17

Answer 10

30 is at -1, 3 spots to the right is at 2

Answer 11

which id say is about 17

Answer 12

okay, 30/17 is about 1.76 in my answer book it reads that the answer should be 0.34 or 34% for histogram A

Answer 13

and histogram B should be 39% and C 31.5%

Answer 14

thanks for taking the time to help me by the way :)

Answer 15

i got it

Answer 16

it will be 200 divided by the added frequencies between the mean and 3 standard deviations to the right

Answer 17

that gives me a solution of 35% though :(