Satitsics

Question 1

Purpose of statistical testing

Answer 1

Provides a way whether a hypotheses should be rejected or accepted- tells us whether differences between variables are statistically significant and not due to chance

Question 2

An example of a statistical test is the sign test- describe

Answer 2

• looks for difference
  -used a related experimental design- repeated measure design
  -collected nominal data

Question 3

How do you conduct a sign test

Answer 3

• work out the difference between the two sets of data- find out if it’s + or -
• add up the total + or -
  -find out the least recurring sign which equals s
  -find out the N value- the number of pps but don’t include pps where there is a difference of 0
• find the critical value of S- use the calculated N value at p= 0.05- the S value must be lower then critical value to reject the null hypothesis

Question 4

What is the acronym to choosing an inferential stats test

Answer 4

Carrots should come
Mashed with swede
Under roast potatoes