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

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 t value and bees, forgot how to do degrees of freedom so i just said 40, rejected alternate hypothesis. think i got 0.18mm for the vessel

Reply 42

Freya_Bea

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

Reply 43

Original post by Freya_Bea

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

i wrote about doing a serial dilution

Reply 44

rayamer

8

Original post by 67824930

Omg what graph area

yeah i never used graph area

Reply 45

medium23

Original post by fegbird

got the same t value and bees, forgot how to do degrees of freedom so i just said 40, rejected alternate hypothesis. think i got 0.18mm for the vessel

Mostly the same as the previous person, same vessel as you but 38 for degrees of freedom …

Reply 46

medium23

Original post by Freya_Bea

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

I put 3:7 ?

Reply 47

d00r

3

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.

i got 0.15 for tracheole measurement
39 for degrees of freedom
7.6 for t value
3.5 for bees
wtf graph area??
alternate hypothesis accepted null rejected

(edited 10 months ago)

Reply 48

Me_43

Original post by 67824930

Omg what graph area

isnt It (n+n)-2 for degree of freedom

Reply 49

medium23

Original post by Me_43

isnt It (n+n)-2 for degree of freedom

I think so … hence 38

Reply 50

Me_43

Original post by medium23

I think so … hence 38

Yup

Reply 51

sylkiebot

10

I failed this test man it was so bad. I'm pretty sure I'm gonna end up with a C overall :frown:

Reply 52

what did people get for hardy-weinberg

Reply 53

Freya_Bea

Original post by ifif4

what did people get for hardy-weinberg

0.50/50%

(edited 10 months ago)

Reply 54

Original post by Freya_Bea

0.50/50%

same

Reply 55

I got the t test question wrong. I didn't use the means and standard deviations they gave but overcomplicated things and worked it out using the bar graph. Do you think I could still get some marks?

Reply 56

Original post by ifif4

I got the t test question wrong. I didn't use the means and standard deviations they gave but overcomplicated things and worked it out using the bar graph. Do you think I could still get some marks?

what did you get as the t value

Reply 57

Original post by fegbird

what did you get as the t value

like 2.41 something

Reply 58

Original post by sylkiebot

I failed this test man it was so bad. I'm pretty sure I'm gonna end up with a C overall :frown:

can never tell with this subject and exam board, ive had mocks and tests before where ive answered almost every question confidently and not even gotten half marks. these exams are such a bad way of measuring a students intelligence imo

Reply 59