What was the mc that had answers like 1.96 plus or minus some proportion
Was the answer .062 plus or minus the proportion?
Didn’t really like the MC, mostly because I didn’t know there was the chart information at the back of the book.
FR was super easy and most of MC was super easy, but ugh.
for the one that was like 1.024 +/- (2.306)(xxxxx), what did you guys put. I did times 1.01, but one of my friends said it was times 3.03
@Woandering
None of the mc involved the chart.
wait okay so for #4 i did a two-proportion z-test and got like .08 ish for the p-value so i said that we failed to reject the null and that there was insufficient evidence to believe that low-dose aspirin did NOT decrease one’s chance of gaining colon cancer because the null hypothesis was low-dose aspirin will decrease one’s chance of gaining colon cancer. did anyone else get this? i don’t even know if that was right i was so dead by that point.
^ you were supposed to reject the Ho. You got the wrong p value.
@APmaster007
Jeez you remember A LOT OF questions…
And yea, the two graphs ones, hard. There’s one question on 2007 MC that resembles the one on the test, but that one didn’t make sense to me, so I missed today’s too. HA.
@tina23
What two graphs one?
Wait so let’s say u didn’t get the right p-value and instead of rejecting the Ho said fail to reject the Ho, would u lose all the points?
@bobchillax
Are you talking about the problem with the regression formula. the answer was 1.024 +/- (2.306)(coef). I don’t remember the number, but I think it was B.
@APmaster007 you got form O?
@chienzhouzz depends on 1.if you got the two hypothesis and interpretation right; 2. Z score; 3. P value; 4. Conclusion. If you are still worried, go to college board and see the frq for previous years. The scoring guideline should be pretty clear.
@chienzhouzz
you won’t lose all the points. You listed the type of hypothesis, so that is one. You listed your conditions, so that is 2. And you probably will get a 3 for the p value and conclusion even though it is wrong. So a 3/4
@tina23
Yeah I did. Are you talking about frq #5?
What about the mc one about juniors and seniors and gpa and grade level. What was/were the block(s)?
@APmaster007 no I was talking about MC. There are two graphs ones, one about dice and the other is about stupid candy or whatever. I think I got both wrong
@tina23
yeah, I remember those two. What were they asking for?
@APmaster007 the dice one is about the smallest number on three faces? Can’t remember. Candy one is like 10% chance to be a yellow candy, 100 trails, what’s the graph. What did you choose for those two
for the binomial distribution one, i said it was the downward sloping one. while this just didnt make sense to me intuitively, i believe it could be test by checking see what the probability for having a “six” be the lowest roll (you would need three “6’s,” which would be a 1/216 probability). There was only one graph that had a distribution this small, so i picked that.
What’d you guys get for the linear regression model slope confidence interval? I know it was b(+/-)t*SEb, but I didn’t know what SEb was in the data box, haha… Also, what’d you guys put for the last one for interpreting 90% confidence?
@APmaster007 I had thought of using the coefficient thing at first, but then i remember that linear regression tests are “t” tests. when i did inv(T) on my calculator, i got 2.306 for the t* value. the answer involving the coefficient had a t* value of 2.365 - i guessed that they had put the coefficient value that appeared on the table in to trick us. the SD given at the bottom was also 3.03, but since there were nine data points in the sample, i was pretty sure that you had to divide the SD by sqrt (9), or 3, and ended up getting 1.01. Please let me know if ive made some big mistake here.