00:01
For this question, first of all, let me take notes what's given here.
00:04
The confidence level was given here, which is given as 95 percent, and the margin of error, the margin of error was given as 2 percent.
00:12
We can write this as 0 .02, and the 95 percent, which is 0 .95 here.
00:19
First of all, remember the formula for the margin of error, which is equal to z alpha over 2 times, this is the square root of p times n 1 minus p, and divided by n here.
00:31
So there is no given probability here, so in this case we are going to just take the probability as 0 .5, and this is all inside the squared sign.
00:40
So let me just leave the n alone here, so take the square root of the both sides, which is the margin of error squared is equal to z alpha over 2 squared, and times this is p times 1 minus p, and divided by n...