00:01
For this question, first of all, let me just take notes what's given here.
00:05
So this distribution has a mean.
00:07
So the mean, which is denoted by mode, this is 3 .5.
00:12
And what about the standard deviation? so the standard deviation, which is denoted by sigma, that is 1 .71.
00:20
So let me just try to get the variance here, because we will need this one.
00:24
So the variance, which is equal to the square of the standard deviation.
00:29
So we can just say the variance, which is denoted by sigma squared.
00:34
This is 1 .71 squared.
00:37
This is 1 .71 squared.
00:40
That would be 2 .92 and 41.
00:44
Okay, this is the variance.
00:46
So the sample size, so this is rolled 39 times.
00:52
So in this case, the n value is given as 39 here.
00:55
So we have the problem of getting the average of 30 rolls.
01:00
Essential than the three.
01:03
So what we have to do here? so first of all, we need to get the mean value.
01:09
So if the mean value for this population is 3 .5, if we just roll it 30, i mean for the first die, i mean just one die, this is 3 .5.
01:21
What about if we just roll it as 39 times? so the new mean value, let's say this is again new one, which is equal...