Question

need help

Answer 1

can you do part a?

Answer 2

i did attempt, and got a answer in the 40k area so i dont think so

Answer 3

the mean is 47 (ignore the 1000s)
the std is 4

how "far" is 40 from 47 ?
now many standard deviations is that ?

Answer 4

47-40 is 7

Answer 5

ok, and because 40 is "below" the 47, we do: 40 - 47 = -7
(we always do number - mean)
next, how many "standard deviations" is -7 ?
divide -7 by the standard deviation. what do you get ?

Answer 6

what did you get? I got a decimal

Answer 7

i got exactly -1.75

Answer 8

yes, if you draw a bell curve, you have this situation