00:01
Okay, in this question we have a sample of 90 students with a mean weight of 89 kgs, and we want to find the z score of a sample from the population with the mean weight of 59 kgs and standard deviation of 37 kgs.
00:13
So starting off, we first want to identify the formula for the z score, which is simply z equals x bar minus mu all over sigma divided by square root of n.
00:25
And now from the problem, we want to identify these variables right here.
00:30
So starting off, oops, square root, just n.
00:36
Starting off x bar is simply the, sorry, not population, the sample mean.
00:43
So here, a sample mean is given to be 89 kgs, so 89 kgs.
00:50
Mew in this case is the population mean.
00:54
So population mean here is 59 kgs...