00:01
Let me take notes what values are given here.
00:03
They are given 2, 4, 6, 8, 16 numbers.
00:07
So, the sample size is 16 and the confidence level which is 90 percent.
00:11
So, we're going to find the confidence interval for the population mean.
00:15
So, what i need? the first one, i need the sample mean.
00:19
So, the sample mean which is denoted by x bar and also for part b, i need the sample standard deviation which is denoted by s here.
00:29
So, i'm going to get those values using the calculator.
00:31
So, the first step, i'm going to put all those 16 numbers on the calculator.
00:36
So, press the button stat and the edit enter.
00:38
I previously just put those 16 numbers on the calculator just to save some time and to get the mean and the standard division, press the button stat and the calculation tab, one variable statistics, hit the enter and again hit the enter.
00:52
So, the sample mean is the same, the first number which is 7 .49 and the sample standard division is s sub x value which is 1 .64 here.
01:03
And the part c, let's remember the formula, the confidence interval for the population mean which is the sample mean plus or minus.
01:10
Because we know the sample standard division, we have to use the t distribution here...