00:01
Hello everyone, let's solve the given question.
00:02
So, as according to the question in part 29, c is equals to 0 .90, sigma is equals to 6 .8, e is equals to 1, z 0 .1 divided 2 is equals to 1 .615.
00:17
So, the sample size n is equals to z the sigma divided 2 divided e whole square, then it is equals to 1 .645 multiplied by 6 .8 divided by the 1 whole square is equals to the 125 .1266 equivalent to 125.
00:48
Now, moving to part 30 of this question, then according to the part 30, c is equals to 0 .95, sigma is equals to 2 .5, e is equals to 1, then we get z alpha divided 2 is equals to z 0 .05 divided 2 is equals to 1 .96.
01:09
So, therefore, n is equals to z alpha divided 2 multiplied sigma divided e whole square is equals to 1 .96 multiplied by 2 .5 divided 1 whole square.
01:21
On solving this, we get it equals to 24 .01 equivalent to 24.
01:26
Now, moving to the part 31 of this question and according to the c is equals to 0 .80, sigma is equals to 4 .1, e is equals to 2, z alpha divided 2 is equals to 1 .282...