00:01
Hi, i'm david and i'm meeting help you answer your question.
00:04
Now let me bring up your question here.
00:06
In this question here, when you discuss about the confident interval for the mean, let me remind you that the conflict interval for the meal, it will be the xb plus or minus the t and minus 1 degree freedom and 4 over 2 time with the s over square n.
00:24
In this question here, we're given the sample n equal to the 51, the xxpah equal to the 1 .1 and the standard deviation equal to the 4 .9.
00:38
This will be the s here.
00:40
Now we see we have given the x bar s and the n.
00:45
So we need to find the critical value, the t and minus 1 degree freedom and for over 2.
00:52
Here n equals to the 50, so the 51 so degree freedom equal to the 50.
00:57
And for over 2, we want to find the 90 degree freedom equal to the 50...