Statical Tests

Question 1

When is the chi squared test used

Answer 1

When you are looking at frequencies and whether my observations differ from expected values.

Question 2

When is the spearman’s rank correlation used

Answer 2

Whether there is a difference in means between two seperate/independent groups.

Question 3

When is the student’s t-test/ unpaired t test used

Answer 3

Looking at whether there is a difference in the means between two separate/independent groups.

Question 4

When is a Paired t test used

Answer 4

When there is a difference in means between two between the same group before and after a change.

Question 5

What is the null hypothesis

Answer 5

It is the claim in scientific research that the effect being studied does not exist.

Question 6

What is the alternative hypothesis

Answer 6

That the effect being studied does exist.

Question 7

In a spearman’s rank test what do the values of r/s show

Answer 7

If it is +1 then it shows a perfect positive correlation

If it’s -1 it shows a perfect negative correlation

If its 0 then it shows no correlation

Question 8

How do we reject or accept the null hypothesis using the spearman’s rank test

Answer 8

If the value of R/s is greater than the critical value we can reject the null hypothesis, whereas if it is less than the critical value we accept the null hypothesis.,