00:01
So we're presented with an mcat question.
00:03
So a random sample of 50 medical school applicants at a university have a mean raw score of 31 and a standard deviation of 2 .5 that's told us later on on the multiple choice portion of the mcat.
00:15
A student claims that the mean raw score of the school's applicants is more than 30.
00:20
So we have our null hypothesis being equal to 30.
00:25
And what our alternative is is what they claim.
00:27
So we're testing to see if it's going to be greater than 30.
00:32
Now, just so we're clear, before you run through this, make sure that you test your assumptions and conditions.
00:38
So you want to make sure that your sample is independent or the independent assumption.
00:43
So each test is independent.
00:46
Each of these students was randomly selected and 10%, this is less than 10 % of the medical students applying to the school.
00:54
We also need the nearly normal assumption.
00:56
So assuming that these scores are normally distributed, that would kind of match with a standardized test like the mcat...