00:01
So you have a question, and part of it will not show on the screen once i took the question, and it says an industry expert claim that the sporting goods average sales is $260 a square foot.
00:16
And a hypothesis was requested, and then i can't read the rest of that.
00:22
And i believe to do a test to see if the expert is correct.
00:30
And he believes it's 260.
00:33
Alternatively, it's not 260.
00:35
And it said when the true average is $300 per square foot, assume that the population standard deviation is 100.
00:43
And the sample size, i can't see.
00:45
I believe when the question first came up, it showed, and then it went away.
00:49
I think it said 40 or 41, but i'll just do the problem with it being m.
00:54
Now, i do not have access to your file apparel.
00:58
So what you need to do is you need to get your file, and from the apparel file, you need to find the mean.
01:08
So you need to find what the x bar is for that file.
01:13
You don't need the sample standard deviation because you are going to use the population standard deviation.
01:19
And then you also want that sample size, which i believe was 40 or 41, but will you just get the sample size? this will be a z test because you know the population standard deviation.
01:32
And the idea that they say when the true average is 300, well, that's not what he's hypothesizing...