00:01
All right, so in this question, we are dealing with writing out a null and alternate hypothesis for some type of problem.
00:09
Now, there's a lot of these answers that could very well be correct.
00:13
The only one that's automatically out is c because our null hypothesis is always going to be mu or p, depending on if its means or proportions, equals.
00:22
And c does not have that.
00:23
So c is out.
00:24
To determine between a and b and d, we need to look at the rest of the problem.
00:30
Which i'm not able to see.
00:31
If it is a matched pairs type of problem, that's telling you it's either a or b, because the mu of d is the true mean difference in our pre -post, whatever it is.
00:50
Is it a pre -test for a class and a post -test if it is a weight loss program? you weigh before the program, way after the program, but everybody is receiving both of the numbers and the only number you're actually interested in is the difference.
01:07
Did they increase in what they were doing? did they decrease in what they were doing? okay? and we'll break that down...