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AS OCR Biology Depth 07/06/16 Unofficial Mark Scheme

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Reply 20
Avatar for haes
haes
6
Original post by 4nonymous
Why do you look at 0.001 for p. I thought you look at 0.05?


i agree, i'm sure you look at 0.05
Original post by Ozil5
Wasn't it
Mitosis
Meiosis
Mitosis
Meiosis
Mitosis


I did that
Original post by Ozil5
Wasn't it
Mitosis
Meiosis
Mitosis
Meiosis
Mitosis


Yeahhhhhhh


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Original post by MouldyToeNail
I put binary fission as well!!!


Sameeeee, hope it's right D:
Original post by Ozil5
Wasn't it
Mitosis
Meiosis
Mitosis
Meiosis
Mitosis


The last 2 were meiosis
Original post by 4nonymous
Why do you look at 0.001 for p. I thought you look at 0.05?


You could say that it's higher at 0.05 so it's significant, I just went the extra step and said it's significant even at 0.001 so we can be even more sure results are significant (low chance of type 1 error)
Reply 26
Avatar for Ozil5
Ozil5
8
Original post by brodingoson
The last 2 were meiosis


Nah I think you're wrong man
Original post by brodingoson
The last 2 were meiosis


Pretty sure they weren't
Original post by IntellectualBoss
You could say that it's higher at 0.05 so it's significant, I just went the extra step and said it's significant even at 0.001 so we can be even more sure results are significant (low chance of type 1 error)


But for biology you're only ever supposed to use the 0.05 value. Thats what we got told.
Original post by 4nonymous
I did that


I did that as well but my friend pointed out that thats incorrect because the zygote which is diploid turns into haploid which is a reduction division (in meiosis 1) which only happens in meiosis.
Original post by Ozil5
Nah I think you're wrong man


Ok
Original post by brodingoson
The last 2 were meiosis


I think it's actually meiosis, mitosis- because the embryonic cells are unspecialised and divide by mitosis to produce more? I dunno.
Original post by 4nonymous
But for biology you're only ever supposed to use the 0.05 value. Thats what we got told.


Well I got the marks anyway cuz like I said I went the extra step after saying its significant at 0.05 so I would still get marks for that.
Original post by IRoranth
I think it's actually meiosis, mitosis- because the embryonic cells are unspecialised and divide by mitosis to produce more? I dunno.


I don't know either, only 1 mark
Original post by IRoranth
I think it's actually meiosis, mitosis- because the embryonic cells are unspecialised and divide by mitosis to produce more? I dunno.


Yes that's what I did too

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Original post by IRoranth
Sameeeee, hope it's right D:


Quite a few people are saying that it is natural selection, hope we're right!
Original post by 4nonymous
Why do you look at 0.001 for p. I thought you look at 0.05?

This is what I thought too! I've always been told 5%
Original post by 4nonymous
Why do you look at 0.001 for p. I thought you look at 0.05?


Did you not read the table? The value of 13.834( or whatever) fell in the range from 0.01 and 0.001 p.
Original post by RadonGhost
Did you not read the table? The value of 13.834( or whatever) fell in the range from 0.01 and 0.001 p.

Yes but you dont look where your value falls.
My textbook says "In biology we always consider the 5% significance level". No idea why though lol
Original post by Desouza123
Yes but you dont look where your value falls.
My textbook says "In biology we always consider the 5% significance level". No idea why though lol


Oh right :lol: Probably got it wrong either way

Also, I think the textbook means within 5% significant difference is shown, so a value of 0.01-0.001 is in that range. I don't think it means use the 0.05 value in the table, not entirely sure though.
(edited 7 years ago)

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