00:01
We want to assess the effectiveness of a fitness program.
00:03
And we're looking at d, which is the ending score minus the beginning score.
00:11
So if d is positive, they have improved.
00:14
If it is negative, they have gotten worse at their fitness.
00:18
So we want to know the correct hypotheses here.
00:21
So some general rules to help you.
00:25
The null hypothesis always has an equal sign.
00:28
It could just be equals, it could be less than or equal to, it could be greater than or equal to.
00:35
But any of the answers that doesn't have an equal sign in the null hypothesis or has an equal sign in the alternative is not going to be the answer.
00:43
So we can immediately roll out options a, b and looks like those are all of them.
00:50
So c, d and e are our remaining options.
00:53
Which one could be correct? so the alternative hypothesis is always just the opposite of the null.
01:01
So if the null hypothesis is something is equal to the alternative would be not equal to and so on.
01:08
And it looks like c, d and e all match that...
