STATISTICAL TESTS - BIOLOGY UNIT 6

[Sara1997]

Hello dears,

I can't understand statistical tests :S
How can I draw conclusions out of it and how can I know the critical value, in a Mann-Whitney test and a T-test?
HOW CAN I SOLVE QUESTION 2 IN BIOLOGY UNIT 6!!

 

[Asifmd12]

Same problem

 

[Sara1997]

exam on tuesday :/

 

[Agent Z]

Hello dears,

I can't understand statistical tests :S
How can I draw conclusions out of it and how can I know the critical value, in a Mann-Whitney test and a T-test?
HOW CAN I SOLVE QUESTION 2 IN BIOLOGY UNIT 6!!

In all experiments (Apart from Mann Whitney and Wilcoxon) if the value is greater than the value at 5% (95% confidence level) then we reject null hypothesis and say there is a significant difference.
For Mann Whitney and Wilcoxon it's the opposite.
T-test, chi test are used for stuff like bar graphs.
For scatter graphs, we use spearmans test to find correlation.
Thats all you need to know.

 

[Sara1997]

In all experiments (Apart from Mann Whitney and Wilcoxon) if the value is greater than the value at 5% (95% confidence level) then we reject null hypothesis and say there is a significant difference.
For Mann Whitney and Wilcoxon it's the opposite.
T-test, chi test are used for stuff like bar graphs.
For scatter graphs, we use spearmans test to find correlation.
Thats all you need to know.

what value? I don't understand :/
Please in more details if possible

 

[aniekan]

-_- Message me.

 

[Xhero]

help me out too please, exam is tomorrow

 

[aniekan]

Inbox me with your problem

help me out too please, exam is tomorrow

 

[Agent Z]

what value? I don't understand :/
Please in more details if possible

The value you'll be given in the question e.g. "T test was carried out and the value was found to be 2.34". Then you'll be given a table, you check the value at 0.05 significance level (this is our critical value, e.g 2.00). So since the value we're given is greater than the critical value and this is a t test we can conclude that there is a significant difference in blah blah blah blah etc (You get the point)

 

[Sara1997]

The value you'll be given in the question e.g. "T test was carried out and the value was found to be 2.34". Then you'll be given a table, you check the value at 0.05 significance level (this is our critical value, e.g 2.00). So since the value we're given is greater than the critical value and this is a t test we can conclude that there is a significant difference in blah blah blah blah etc (You get the point)

ohhhh I understood now! And the null hypothosis is confirmed if the critical value is greater than the t value, am I correct?
So, what about Mann-Whitney test?

 

[teddy cookie 94]

Does anyone have the Jan 2014 paper for this?

 

[Agent Z]

ohhhh I understood now! And the null hypothosis is confirmed if the critical value is greater than the t value, am I correct?
So, what about Mann-Whitney test?

Yes! It's opposite for Mann Whitney and Wilcoxon

 

[Sara1997]

Yes! It's opposite for Mann Whitney and Wilcoxon

Thank u <3

 

[Agent Z]

Thank u <3

Hope it helped in the exam