*Biology Paper 5 tips*

[BeBeskii108]

Another question. When suggesting a null hypothesis how do I know if I should write significant or not significant?

 

[a.abid]

Hey can anybody tell me if I'm right or not with the following statement:

*If the probability is less than 0.05 or 5% then the given change will be significant and not by chance*

 

[IGCSE student92]

Hey can anybody tell me if I'm right or not with the following statement:

*If the probability is less than 0.05 or 5% then the given change will be significant and not by chance*

yes it is true

 

[shafayat]

Another question. When suggesting a null hypothesis how do I know if I should write significant or not significant?

null hypothesis means there is 'NO SIGNIFICANT DIFFERENCE' always.. there is no question of significant or not, cuz its always not...

 

[sitooon]

If they say Give ONE ( and make it bold ) .. will we be penalised for writing more than one ?

 

[shafayat]

If they say Give ONE ( and make it bold ) .. will we be penalised for writing more than one ?

depends on what they're asking ..

but in CIE there is no negative marking! if you write more than one.. the first answer is choosen regardless of its accuracy ..

 

[sitooon]

depends on what they're asking ..

but in CIE there is no negative marking! if you write more than one.. the first answer is choosen regardless of its accuracy ..

I c
btw , which will be on x and y axis ?
If you did this paper, can you scan it plz?

 

[BeBeskii108]

I c
btw , which will be on x and y axis ?
If you did this paper, can you scan it plz?
View attachment 41578

Bar chart, Number of beans per pod on x-axis, frequency on y-axis

 

[BeBeskii108]

null hypothesis means there is 'NO SIGNIFICANT DIFFERENCE' always.. there is no question of significant or not, cuz its always not...

Thanks

 

[redd]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w10_qp_53.pdf

In question no. 1 part c(iii)

why are we not multiplying the standard error with 2 when drawing the graph i.e why not drawing the error bars +-2(1x2) and +-4(2x2)?

 

[sitooon]

How to know if we should waterbath / room temp .
now i have seen many times they choose one and reject the other !

 

[MÁťT PŭמҚ]

mayjune 2010 paper 52 question1 (c) i
how to do this?

 

[MÁťT PŭמҚ]

oct nov 2009 paper 52 q2 b

 

[Zarif009]

Another question. When suggesting a null hypothesis how do I know if I should write significant or not significant?

you should always write in the null hypothesis that the differences are not significant. That's what the null hypothesis is defined by

 

[Dania_Yz]

What's the dilution factor

 

[JoHN_95]

Hiw to make dilutions from the main stock solution ? Mostly they reject serial dilution can anyone suggest a easy procedure ?

 

[sitooon]

Everyone is asking here and no one to clear our doubts

 

[Zarif009]

What's the dilution factor

not needed

 

[Zarif009]

What are the different ways of keeping temperature constant in an experiment?
The two ways I can think of atm are thermostatically controlled water bath and Temperature controlled room

 

[1357911]

Hiw to make dilutions from the main stock solution ? Mostly they reject serial dilution can anyone suggest a easy procedure ?

They reject serial dilutios? I dont think so.

What are the different ways of keeping temperature constant in an experiment?
The two ways I can think of atm are thermostatically controlled water bath and Temperature controlled room

heat screen/heat filter.

incubator