00:01
Hello, we would like to know how many adults have osteoporosis.
00:07
So the first thing that we can do is we can make a bra of a belb -shaped curve.
00:16
And our mean in this case, we'll talk about young and adults.
00:21
It's going to be zero.
00:24
And we're looking at people who have osteoporosis if they're negative 2 .5 below.
00:33
The mean so we'll be here so the amount of people that have osteoporosis will be to the left and we could actually break it up a little bit further to let's say negative 3 here and this little red part right here this will be 0 .1 % and this blue part here is going to be 0 .5 % and if we were to add it up we'll get 0 .6%.
01:22
So we know 0 .6 % of young adults have osteoporosis.
01:45
Now in part b we're going to talk about older adults and we still want to know they have osteoporosis.
01:56
We can still draw a bell -shaped curve.
02:00
The only thing now is that instead of the mean being zero, our mean is going to be negative two, so it has shifted towards the left.
02:15
In order to figure out the number of people with the superosis, we have to normalize this...