How is this possible?

"ttyymmnn" (ttyymmnn)
10/27/2020 at 16:11 • Filed to: None

My high school senior is struggling with his AP Stats class. It’s a long story, but I’m not sure his teacher is doing him any favors. He’s doing an online assessment, and he was asked to rank three things in order of strength of correlation.

He got two right.

How is that even possible? If 1 and 2 are correct, then 3 must be correct. If 2 and 3 are correct, then 1 must be correct. If 1 and 3 are correct, then 2 must be correct.

DISCUSSION (15)

Highlander-Datsuns are Forever > ttyymmnn
10/27/2020 at 16:22

A>B>C

A>C>B

B>C>A

You can have two right and still have a different result because of the overall order ?

MasterMario - Keeper of the V8s > ttyymmnn
10/27/2020 at 16:25

Maybe the software grading it is doing more than looking at 1-2-3? Maybe you put it as 3-1-2 and it sees that 1 and 2 are still ranked in the correct order but 3 is not...that’s the only way I can explain it beyond the system just being flat wrong, which is probably the more likely scenario.

ttyymmnn > Highlander-Datsuns are Forever
10/27/2020 at 16:25

Hmm. Maybe so.

For Sweden > ttyymmnn
10/27/2020 at 16:26

If he can’t figure out the order of three valves , he may not be trumpet material.

ttyymmnn > Highlander-Datsuns are Forever
10/27/2020 at 16:26

It seems to me, though, that the whole thing wold have to be correct, and not just an element of it.

ttyymmnn > For Sweden
10/27/2020 at 16:27

There’s only 7 combinations that we actually use, so it’s not that hard.

ttyymmnn > MasterMario - Keeper of the V8s
10/27/2020 at 16:28

Yeah, see Highlander’s reply. That’s probably it, but you would think it would look at the answer as a whole, and not just elements of it.

Highlander-Datsuns are Forever > ttyymmnn
10/27/2020 at 16:31

Hey, 2 out of 3 ain’t bad.

Noodles > ttyymmnn
10/27/2020 at 16:36

That's a pretty good line drawing of Jackie Chan

ttyymmnn > Noodles
10/27/2020 at 16:40

It is. I can assure it is not mine.

Daily Drives a Dragon - One Last Lap > ttyymmnn
10/27/2020 at 16:48

The first thing I was told in my first stats class was, “There’s lies, damned lies, and statistics.” So maybe?
Or the teacher is just splitting hairs. If enough people get two right and one wrong they might realize the key is wrong?
Was having two of them equal an option?

MoCamino > Highlander-Datsuns are Forever
10/27/2020 at 16:56

ttyymmnn > Daily Drives a Dragon - One Last Lap
10/27/2020 at 16:57

Was having two of them equal an option?

I don’t know. We are discovering that, particularly at the senior class level, that the biggest problem with online school is computer-graded exams. There’s no room for showing work, so a teacher can’t give credit for work that looks right but might have a misplaced digit, or nuance, or an answer that is right but not recognized by the computer. Sometimes answers are marked wrong just because of the word “the.” It’s not optimal.

Daily Drives a Dragon - One Last Lap > ttyymmnn
10/27/2020 at 18:21

I feel like that’s the general consensus with online learning.

Phyrxes once again has a wagon! > ttyymmnn
10/27/2020 at 18:22

If its an Collegeboard problem there should be a scoring document that goes with it. If it was an old exam question you can get them off their website. If its a new practice problem his teacher should have access to the scoring documents.

Generally speaking when the CB wants you to rank things 1 to whatever they do tend to include language about putting things at the same level.

So 1,2,3,4 and 1,1,2,3, and 1,2,2,3 and others are all valid.