00:01
As for the given question, our sample size n is given as 127.
00:07
Patients were selected for the random.
00:11
So, sample size will be 127, mean x will be equal to 34.
00:19
Population proportion peak gap is equal to x by n.
00:22
So we can calculate this as 34 divided by 127, which is equal to 0 .2.
00:32
6 .7 and therefore our value for peak cap will be equal to after getting rounding of 0 .268.
00:44
So here the significance level, alpha will be equal to 1 minus 0 .95 which is equal to 0 .05 so now we are having our values and then we can find our 0 .95.
01:08
Z alpha by 2 which is equal to z 0 .05 divided by 2 and its value from the z table will be 1 .96.
01:20
So now we will find our standard error.
01:27
Formula for a standard error is square root p gap 1 minus p gap divided by n.
01:37
So now let's put down here values square root.
01:44
0 .268 within the bracket 1 minus 0 .268 for the divided by a sample size which is 127...