00:01
Hey there, welcome to numeraid.
00:03
We are asked to find the minimum sample size here required in order to be accurate by 4%.
00:10
So therefore, we are going to be using our equation here in which we have the proportion times its complement divided by the margin of error, divided by the z critical value squared.
00:25
This is the equation that we will be using to solve for our sample size.
00:31
For part a, we are not given any preliminary estimate.
00:35
Hence, for our proportion estimate, we will be using 0 .50 times 0 .50 divided by the margin of error in which we have 4%.
00:50
So that is 0 .04 divided by our critical value.
00:54
Based off our 98 % confidence, it would be around 2 .33.
01:01
So hence, what we get here is going to be a value, c divided by 0 .04 divided by 2 .3263 squared...