Question

Help with normal distribution?

Answer 1

this should help

http://en.wikipedia.org/wiki/Normal_distribution#mediaviewer/File:Standard_deviation_diagram.svg

Answer 2

That looks like the one our teacher showed us. Except the numbers are .15, 2.35, 13.5, and 34.

Answer 3

ok use the one your teacher gave ... the difference is how you decide to round, both are correct though

Answer 4

Okay, so what would I do for A?

Answer 5

65 is -1 std deviations away , 75 is 1 std deviation away

add up the percentages given in the diagram for the regions between -1 and 1

Answer 6

@dumbcow I think I figured it out, is it 68%?

Answer 7

yes it is :)

Answer 8

Okay, I have the answer, I just don't understand how I got it.