I thought it was very easy - my teacher is great though so that helped
@bobchillax
To find the coef. It is n-2. It was given, you didn’t have to calculate it.
@tina23
Ohh, the candy one, I put A. i jsut did .10 x 30, which is 3. So the dotplots, most of the dots will be close to that.
For the dice one. I think I put D. Where it start of small, then increases, then back decreases.
And @Newdle I put E, for the last one. I think I’m right.
I think SEb was 0.060 or something like that. It is the number next to the slope
@APmaster007 Yay, I did E too :P…
@jamanda I think I couldn’t find .060 O_o… That’s the thing… I thought it was the number second to farthest left on the bottom left.
The SEb was given, 0.06. T* had df of n-2, or 7. This gave a t* of 2.365 w/ the confidence level at 95%, so it was B ± 2.365(0.06)
It seems I did better than I thought on the mc. Maybe I got 30/40 :)>-
Did anyone get form M? Almost everyone at my testing site had form O and came out saying the FRQ’s were super easy but the three kids in the room who had M (including myself) were freaking the FREAK out… MC was ez though.
For margins of error frq part, I said .15 ± .015? People got .03 though, why’s that? I still was able to conclude that .2 wouldn’t be in The interval anymore. But didnt it say n was 4 times as large? If the ME was ±.3 wouldn’t that only be if it was only 2 times as large?
@taishi i didn’t but that’s really weird, i thought everyone got the same form unless u are taking the form B test
What did you get for the blocking question. Was it just grade level or both that and gpa
@user34567 Just grade level
Anybody else not have the tortilla part?
@KenDey i also got .15 + or - .015, not .03.
@writerzt71 It is .03 because of the formula sigma/sqrt(n), so a sample size 4 times as large yields a value of sigma/sqrt(4n) = half as large.
@MrWiggles I put grade level and GPA. The students were matched in pairs based on GPA and grade level? It said two seniors with the highest GPA and so on… Let me know though
For the slope confidence interval, I just chose the one with the SE that was from the chart. Only one answer had it?
@ScreenSaver There was some confusion between a lot of kids at my school about this question. I looked up the definition of blocking, which is defined as when the “variability within blocks is less than the variability between blocks,” and “Compared to a completely randomized design, this design reduces variability within treatment conditions and potential confounding, producing a better estimate of treatment effects.” So that means grade level for sure is one of the answers. I am just not sure if GPA would be, because dividing into pairs of highest GPA seems like matched pairs to me, though matched pairs may be a specialized case of blocking.
So overall on the FRQ, were the questions fair? Sounds like they were harder than last year?