🧮 • Statistics: Spearman's Rho [🧠]

Question 1

Complete this labelled diagram of the formula for spearman’s rank correlation coefficient

Answer 1

Question 2

What ‘type’ of value do you obtain after completing the formula?

Answer 2

The Calculated Value

Question 3

What does the formula for Spearman’s Rho allow you to calculate?

Answer 3

The correlation coefficient

Question 4

What is the correlation coefficient?

Answer 4

A number between -1 and 1 that tells you the strength and direction of a relationship between variable
* Symbol e.g. (+) or (-) = DIRECTION
* Numerical value = STRENGTH
E.G. -0.45 = A CORRELATION COEFFICIENT WITH A WEAK STRENGTH AND NEGATIVE DIRECTION

Question 5

What do you always have to make sure you first, choose on a critical values table?

Answer 5

The correct level of significance for the type of test you need.
* Dependent on our HYPOTHESIS, we either choose:
* the level of significance for a one-tailed test
* the level of significance for a two-tailed test

e.g. if hypothesis was two-tailed you would use level of significance for two-tailed test

Question 6

What level of significance do you ALWAYS choose in a critical values table?

Answer 6

0.05

Question 7

Why do you always have to make sure to properly read the rule of significance at the bottom of the critical values table?

Answer 7

Because it may be different for each critical values table you come across/ each exam you go into

Question 8

EXAMPLE FOR A STATISTICAL RULE AT THE BOTTOM OF CRITIAL VALUES TABLE

The ________________ value must be ____________ to or ____________ the ____________ value in this table for significance to be shown

THEY ARE NOT ALWAYS THE SAME, MAKE SURE TO READ

Answer 8

The calculated value must be equal to or exceed the critical value in this table for significance to be shown

Question 9

What 8 things must you include in a statistical statement?

Answer 9

• Your Calculated Value
• Your Critical Value
• If it is Greater or Less than the Critical Value (🟢)
• What direction (one/two-tailed) the level of significance you used was
• What the level of significance you used was (0.05)
• If it was/ wasn’t statistically significant (🟢determined by)
• Which hypothesis it supports
• The hypothesis it supports (Write entire hypothesis

Question 10

Complete the question on ranking scores

Answer 10