Well, if someone could at least help me with part a...
I figured out part A.
I think I remember a function for the average in this kind of situation...but of course I can't remember it. Does anyone know it?
average value of f from a to b:
= 1/b-a integral from a to b of f(x)dx
And the decimal answer is 100.61. Does anyone know how to find the exact answer?
I figured out part b.
Now during what year was the electrical consumption closest to the average for the century? The average was 100.61...1900 was 1.5...2000 was 605...
It was 1970. And I just guessed on that one, using my calculator to help me. Hehe.
I'm not really quite sure what part d is asking...
Now here are the choices I'm given:
a) The average consumption is on the upper half of the graph.
b) The t-value for the average consumption is on the right side of the graph.
c) The t-value for the average consumption is on the left side of the graph.
d) The average consumption is on the lower half of the graph.