00:01
There are two questions here.
00:02
Let me start with the number four.
00:05
So for this question, i'm to calculate the power.
00:09
We need to know six things.
00:12
Let me just write them.
00:13
The first one is the sample mean.
00:17
And the next one is the population mean.
00:20
This is population mean.
00:24
And the next one, which is the population standard division.
00:34
And the next one, which is the sample size.
00:36
The next one which is the level of significance and the last one which is the critical value of z this is the answer for number four and what about for number five let me take notes what's given here so the main value was given here which is denoted by moot this is 155 and the standard division that was given as 35 here and there is so we can just define let's let's say the x value here given as 165.
01:17
And so the alpha level was given as 0 .05.
01:23
And the weight within the 80%, so the probability given here, which is the 80%, we need to get the how large sample size do here.
01:33
So to solution of this one here, first of all, we need to get the value here.
01:40
Let's say this is, so we have given the average weight of the woman here, which is 155, and the standard division was 35.
01:51
And the power was, which is 80%.
01:53
Let me say this is the power, which is 80%.
01:57
We can write at 0 .8 here.
01:59
So the first one, which is the beta value.
02:02
This is 1 minus 0 .8...