00:01
Hello students we need to write here worth weights of babies born to full term pregnancy follow a normal distribution with a mean weight is given in standard aviation is given babies born with a weight in 2 % are considered over weight we need to determine minimum weight for a baby born to full term pregnancy to be considered overweight so let's start with our answering part we are given here normal distribution and if i write here this must be in in the normal distribution if i write here all the random variables are distributed amongst bell -shaped curve.
00:42
Something like this, if i draw for this, all the random variables are distributed amongst bell -shaped curve.
00:51
So this is z, this is minus z, this is probability of pz, right -hand side area is 0 .5, left -hand -side area is 0 .5.
00:59
And if i write here, total area under normal distribution curve is 1.
01:06
So definitely we need to write here.
01:08
This must be jade score attribute is x minus mu divided by sigma.
01:16
So this will come out as if i write here for this, this is probability of chat value.
01:23
We need to write here.
01:25
Probability of z value is greater than particular j score this value will come out as if i write here for this point is 02 and if i write here for this this must be 0 .02 and so it means that this is particular jad score which shows this right which is point 02 and and if i write here, it means that probability of z value is less than z score that is equal in to 1 minus 0 .02, which is 0 .98.
02:06
It means that we need to find that particular z score which covers up to 98 % of the area...