Can you please explain to me what those numbers mean, what does the 3, 2, 6, 10, 9 and 15 stand for? :/
I'm sorry for the trouble, but this lesson has been annoying me since the IG's!
& again, you solved the wrong question, I wanted part e not d!
Formula for
(i) frequency density (height) :
frequency
= ------------
class width
(ii) class width (interval) :
frequency
= ------------------
frequency density
Now for your question :
3 (a) x = 10 - 15 (9.5 - 15.5); frequency = 15.
class width = (15.5 - 9.5) = 6. This is taken in histogram as 2 cm.
For 16 - 19, width is (19.5 - 16.5) = 3.
In the histogram, the width of the 16 - 18 class will be : (3 X 2)/6 =
1(b) Height (or frequency density) = (15 / 6) = 2.5. This is taken in histogram as 5 cm.
For 16 - 19, height is (9 / 3) = 3.
In the histogram, the height of the 16 - 18 class will be : (3 X 5)/2.5 =
6Tell me if you still didn't get.