Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
MKh:
hey guyz...i hav a doubt in edexcel biology unit 6B...cud any1 help me wid d statistical tests part?
i know dat v r not expected 2 know d formulae or fine details of each test n i even know dat v must only concentrate on selecting d correct type of test and demonstrate our understanding on how 2 interpret d results-this has been stated in the revison guide.
cud any1 plz temme how 2 select d correct type of test and demonstrate our understanding on how 2 interpret d results???
Amii:
--- Quote from: xstrawberryswingx on December 08, 2010, 02:15:55 pm ---June 2010 Unit 1 Question 3 a ii)
--- End quote ---
Molecule A --->Phospolipid
Phospolipids consists of a polar phosphate group which carries a negative charge and is soluble in water - hydrophilic(water-loving).The fatty acid chains(lipid tails) of a phospolipid are neutral and insoluble in water- hydrophobic(water-hating).The hydrophobic molecules are attracted to each other. In water, phospholipids form double layer with the hydrophilic heads pointing into the water and the hydrophobic tails away from water in the centre. The attraction between the hydrophobic tails in the centre and between the hydrophilic heads and the surrounding water makes membranes very stable.
Hope it helps
Take care :D
Deadly_king:
--- Quote from: MKh on December 08, 2010, 08:27:57 pm ---hey guyz...i hav a doubt in edexcel biology unit 6B...cud any1 help me wid d statistical tests part?
i know dat v r not expected 2 know d formulae or fine details of each test n i even know dat v must only concentrate on selecting d correct type of test and demonstrate our understanding on how 2 interpret d results-this has been stated in the revison guide.
cud any1 plz temme how 2 select d correct type of test and demonstrate our understanding on how 2 interpret d results???
--- End quote ---
How to choose the right statistical test?
If you've been given measurements, i.e specific values of a certain thing, you should use :
(i) Standard deviation and standard error when you're looking for variability between the measurements.
(ii) T-test when you're looking for the difference between means.
If you've been given frequencies and you're asked to find the number of individuals in a particular category, then the chi-squared test is used.
moon:
Is the chi-squared test in the syllabus???
Deadly_king:
--- Quote from: moon on December 09, 2010, 12:03:49 pm ---Is the chi-squared test in the syllabus???
--- End quote ---
Hmm..............I don't know about EDEXCEL but it is for CIE. ;)
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