Edexcel A-level Biology B Paper 3 (9BI0 03) - 21st June 2023 [Exam Chat]

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like 2.41 something

i and a few others got 7.6 so thats most likely the answer and your mean and sd are probably wrong, however if you said the right degrees of freedom and rejected the null you'll probably get marks for that

Reply 61

d00r

Original post by ifif4

what was the labels A and B at the start

A was trachea i think
B im not sure so i guessed air sacs

Reply 62

Me_43

Do u know why I got -7.6?

Reply 63

67824930

Original post by d00r

A was trachea i think
B im not sure so i guessed air sacs

I said spiracle for B lol I think that’s wrong

Reply 64

d00r

Original post by Me_43

Do u know why I got -7.6?

i also got -7.6 first. I figured it wasnt right because the values in the table were not even close so i switched the order of numerator (the mean) and got +7.6

Reply 65

Me_43

Original post by d00r

i got -7.6 first. I figured it wasnt right because the values in the table were not even close so i switched the order of numerator (the mean) and got +7.6

Do you reckon I get anything even for conclusion

Reply 66

AAMEH

Original post by ifif4

what was the labels A and B at the start

A= trachea
B= spiracle

Reply 67

d00r

Original post by Me_43

Do you reckon I get anything even for conclusion

for sure. u might also get ecf for calculation too

Reply 68

Me_43

Original post by d00r

for sure. u might also get ecf for calculation

Hopefully ☺️

Reply 69

d00r

Can someone explain the diameter of the tracheoles question? It said trachea was 0.9mm and the image diameter was like 6cm. Tracheoles image diameter was 1cm so divided 0.9/6 to get 0.15 mm

Reply 70

soochiii

Original post by basicacid

What did y'all get for the maths:
3.11 mm for the scale measurement for the lung vessel
21 for the degrees of freedom
around 7.6 for the t value
around 3.5 for the bees question
glad it's over
also that graph area was really tiny.

got the same thing except degrees of freedom isn't 21 bc dof = n-1

Reply 71

soochiii

Original post by Freya_Bea

What did people get for the gibberellin stock solution? I got like 3:9997 but probably wrong

I got the same thing!

Reply 72

fegbird

Original post by d00r

Can someone explain the diameter of the tracheoles question? It said trachea was 0.9mm and the image diameter was like 6cm. Tracheoles image diameter was 1cm so divided 0.9/6 to get 0.15 mm

i measured it as 5mm and did 5/0.9, then did 1 divided by that answer to get 0.18

(edited 10 months ago)

Reply 73

soochiii

Original post by d00r

Can someone explain the diameter of the tracheoles question? It said trachea was 0.9mm and the image diameter was like 6cm. Tracheoles image diameter was 1cm so divided 0.9/6 to get 0.15 mm

that's the method ur meant to use to figure it out but some people got 6 some people got 5 so the answer is either 0.15mm or 0.18mm

Reply 74

lena657391

Original post by Me_43

Do u know why I got -7.6?

i also got -7.6 and everyone in my class and others i know did too. pretty sure its right

Reply 75

fegbird

thoughts on grade boundaries? if theyre as high as 2019 i dont think i can get an A

Reply 76

StudyJourney

I think they might be the same or slightly lower ?

Reply 77

soochiii

Original post by lena657391

i also got -7.6 and everyone in my class and others i know did too. pretty sure its right

I got -7.6 too but then it depends on how you answer the next question? like if you have a minus value its lower than the critical value and if it's positive then you've got a value greater than the critical