Data

Question 1

What is Spearman’s rank?

Answer 1

The process of calculating a number to test the strength of a correlation between two sets of data.

Question 2

How do you calculate spearman’s rank?

Answer 2

This done by creating a table and ranking the two sets of data. Then you do R1 - R2 and square it to get D2.

Question 3

How do you find the rank if a number appears more than once?

Answer 3

You add together what there ranks would be, and divide by the number of ranks.

Question 4

What is the Chi-squared test?

Answer 4

Used to investivgate if there is a significant difference between observed data and expected data.
example null hypothosis: ‘there is no significant difference between observed distribution and expected distribution

Question 5

How do you calculate chi-squared?

Answer 5

Add collumns:

• observed - Expected
• (O-E)2
• (O-E)2/E

Question 6

When can you reject the null hypothesis?

Answer 6

When the result is below the the critical value.