00:01
Hello, so let's look at the parameters here.
00:05
So we have our mean of 3290, standard division of 5 to 0.
00:18
We want to find a percentage of new bones that weigh between 3 ,000 and 4 ,000.
00:34
So this is a normal distribution.
00:36
So we're going to do x minus mu, so 30 ,000 minus 3290.
00:44
Standard division 5 to 0 rather than x minus new on the standard division on the right we're going to have 4 ,000 minus 3290 divided by 5 to 0 so we have 3 ,000 5 we have negative 0 .5 6 less than z then now we have 4 ,000 that's 1 .37.
01:45
So with this we can now do probability of z less than 137 minus the probability of z less than negative 0 .56.
02:02
So let's go to the z table...