00:02
Okay, so here, i can't actually see enough of the question to give a full answer.
00:06
And we also can't see the file used cars, so i can't help with specific numbers either.
00:11
But what i thought i'd do is i thought i'd just hop on and explain how you might start a question like this.
00:16
And then if you do want a more specific answer, please do upload a photo, which gives us more information so we can help you specifically.
00:22
But so we've got, it says we've got a mean price of 10 ,192, and we're taking a sample of 50 ,000.
00:30
From this population and we want to see at a particular dealership and we want to see if the mean price for cars at that particular dealership differs from the the national average.
00:44
So we're investigating the population parameter at mu d for the average car price at this particular dealership which is why i've called it mu d and we've taken a sample of size 50 and we want to compute its mean and that i'll call that x bar d.
01:01
And because it's a sample from the population with parameter mud, we say it follows a normal distribution with parameter mud and some solid deviation, or some variance, i should say.
01:25
And so our null hypothesis is going to be that this mud is equal to mu that i wrote above the national average.
01:32
And the alternative hypothesis is going to be that it's not equal to me.
01:38
And so what we'll do is you'll calculate a test statistic for your sample...