00:01
Hello students, according to the given question, we have to find the sample size.
00:08
So, in question 9, it was given sigma is equal to 0 .2 and e is equal to 0 .05 and confidence level is equal to 90 percent.
00:20
So, z critical value is equal to 1 .645.
00:25
Now, the sample size n is equal to z critical value into sigma by e whole square.
00:34
By substituting n is equal to 1 .645 into 0 .2 is divided by 0 .05 whole square.
00:44
So, that is equal to 43 .2964.
00:48
So, that means option 2 is correct.
00:55
Now, in question 10, it was given confidence level is 95 percent, then z critical value is 1 .96...