00:01
In this question, we have been given that sample mean.
00:04
Let us here write, it will be here sample and now it is here mean.
00:09
So this is equals to 8 .4 and then here it is minutes.
00:14
Now if we talk about the standard deviation, so basically we are talking about sample standard deviation.
00:21
So it can be here written as s -t -a -n -d -d and then here it will be deviation.
00:27
So this is given as 3 .5.
00:33
Now if we talk about the sample size that is n, then it will be here equals to 49, and now the degrees of freedom can be here written as n minus 1 and that is here equals to 48.
00:46
So from this we can say that the value of t and then here it is alpha divided with 2 comma degrees of freedom at 90 percentage confidence level.
00:57
So it can be here written as c -o -n -f -i -d -e -n and then here it is c -e.
01:04
Now it will be here level.
01:06
So this value is here equals to 1 .6 and then here it is 7 -7...