00:01
Hello, students, we need to write here.
00:02
This is our data regarding before and after we need to find confidence interval 90 % confidence interval for mu d.
00:10
So, basically, if i write here for this differences are this must be written as the friend says, we need to write here for this.
00:23
This is 50 minus 46.
00:28
We need to write here and 64 minus 42.
00:33
And this is 57 minus 54.
00:36
And this is 52 minus 39.
00:40
We needed to write here for this, this must be written as 59 minus 55.
00:50
We needed to write here and 65 minus 36.
00:56
So basically, we need to write here for this, this must be 50 minus 46.
01:04
That is four and 64 minus 42.
01:08
This is 22 we need to write here 57 minus 54.
01:13
That is three and 52 minus 39.
01:18
We need to write here for this, this is 13.
01:21
This is 59 minus 55.
01:24
We need to write here for and 65 minus 36.
01:28
That is 29.
01:29
So basically, if i write here for this, so this must be sample mean, we need to write here with a sum of all data four plus 22 plus three plus 13 plus four plus 29.
01:47
And this must be divided by we needed to write here, this must be divided by six, which is 75 divided by six, that is 12 .5.
02:01
So basically, we needed to write here, this must be written as so now we are going to calculate our sample variance and after that we will calculate sample standard deviation.
02:15
So basically, if i write here four square 22 square three square, we need to write here 13 square plus four square plus 29 square and this whole term must be divided by we needed to write here for this and minus one, which is five.
02:34
So basically, if i write here for this, this must be written as, or we can say we have used a formula of summation of xi minus x bar, we need to write here for this raised to power two divided by n minus one...