Math Advanced Prediction/Thoughts (2 Viewers)

[Jerryclover]

i didnt realise 33d was linked with the other fml

oh wtf. Didn't even realise

 

[stupidpersonlol]

I think its wrong, they gave u the mean and SD so it has to be something to do with z-scores which the answer didn't include. not to mention the z score is exactly 2, so probs with empirical rule as well. i did it as a conditional probability

I WAS GONNA DO THAT BUT I GOT LIKE 0.2

 

[Jerryclover]

I think its wrong, they gave u the mean and SD so it has to be something to do with z-scores which the answer didn't include. not to mention the z score is exactly 2, so probs with empirical rule as well. i did it as a conditional probability

ahh, that makes sense. So probably probability of picking someone with 130 iq GIVEN that they finish the puzzle under two hours. Then i'll probably get 1 mark since i calculated the z value.

 

[stupidpersonlol]

ahh, that makes sense. So probably probability of picking someone with 130 iq GIVEN that they finish the puzzle under two hours. Then i'll probably get 1 mark since i calculated the z value.

ok at least ill get 1 mark also

 

[Jerryclover]

ok at least ill get 1 mark also

that's GOOD. 1 mark can make the difference between band 6 and 5

 

[stupidpersonlol]

wait but if u did conditionla probability what answer did u get- coz i did that but got 0.02 which wouldn't be to 3 dec points

 

[stupidpersonlol]

wait im pretty sure Q25 has worked it out incorrectly

they said 8(1000) x 8.2132, but i swear it should just be 1000x8.2132

i got like 10k or something

 

[Jerryclover]

i got like 10k or something

yeah, you're right.

 

[CM_Tutor]

Sir, can you check question 33? is that right? Aren't they independent events? So shouldn't it just be calculating the z score of z=(130-100)/(15)?

The answer given for q33(d) is incorrect, it is a conditional probability problem as the question asks for P(IQ > 130 given can solve the problem in under 2 h)

 

[Jerryclover]

The answer given for q33(d) is incorrect, it is a conditional probability problem as the question asks for P(IQ > 130 given can solve the problem in under 2 h)

Thanks, i got it now

 

[Jerryclover]

yeah it cant be anything higher than 20000

it should be 8419.81

1000x8.2132 = XYZ

XYZ(1.0125)^2 = 8419.813313

she has only invested 8000, i doubt she could accrue another 60000 lmao

yep, this

 

[stupidpersonlol]

omg theres hope i pass!!

 

[notme123]

cant wait for the 3u exam to be filled with perms and combs

dont jinx it man but at this rate all of q14 will be perms and combs

 

[stupidpersonlol]

dont jinx it man but at this rate all of q14 will be perms and combs

babes im screwed for ext 1 as well...if its like today

 

[CM_Tutor]

I got 0.066

As did I, but I'd like to check it again

 

[CopperPike]

I don't know if this was mentioned previously...but as the question asks for height above ground level, shouldn't the answer be 445m (so 345+100 above ground level)?

 

[stupidpersonlol]

View attachment 33772

I don't know if this was mentioned previously...but as the question asks for height above ground level, shouldn't the answer be 445m (so 345+100 above ground level)?

PLEASE NO

 

[RedNalick]

View attachment 33772

I don't know if this was mentioned previously...but as the question asks for height above ground level, shouldn't the answer be 445m (so 345+100 above ground level)?

I think because the equation already has the 100 in it, you don't need to add the 100.

 

[Jerryclover]

View attachment 33772

I don't know if this was mentioned previously...but as the question asks for height above ground level, shouldn't the answer be 445m (so 345+100 above ground level)?

No. The +100 in the equation y(t) accounts for that. But this question is fk'd up for advanced honestly, it's more of an ext1 question

 

[stupidpersonlol]

No. The +100 in the equation y(t) accounts for that. But this question is fk'd up for advanced honestly, it's more of an ext1 question

yea projectile motion came in handy