00:01
For this question, we are interested in the mean call backton for the online computer support complaint.
00:10
So this is a parameter of interest.
00:13
We are interested in this.
00:15
Suppose this is mu, which is the parameter of interest.
00:19
And then we have the sample.
00:22
Sample main, let's say sample may will follow.
00:26
We use the central lemon theorem, and we have 36 calls, which is over 30, so we can use the central limit theorem.
00:38
And the sample mean will follow a distribution, a normal distribution, with mu as the main, mu is the parameter of entries.
00:49
And variance equals the population variance divided by the sample size here...