choosing statistical test

Question 1

when should chi squared be used?

Answer 1

• test of difference
• unrelated design (independent groups)
• nominal data (categories)

or

• test of association or correlation
• nominal data (categories)

Question 2

when should Mann Whitney be used?

Answer 2

• test of difference
• ordinal data (order/ unsafe)
• unrelated design (independent groups)

Question 3

when should Wilcoxon be used?

Answer 3

• test of difference
• ordinal data (order)
• related design (repeated or matched pairs)

Question 4

when should related t test be used?

Answer 4

• test of difference
• related design (repeated or matched pairs)
• interval data (numbers and scales)

Question 5

when should unrelated t test be used?

Answer 5

• test of difference
• unrelated design (independent groups)
• interval data (numbers and scales)

Question 6

when should spearman’s rho be used?

Answer 6

• test of association or correlation

- ordinal data (order)

Question 7

when should Pearson’s R be used?

Answer 7

• test of association or correlation

- interval data (numbers and scales)

Question 8

what is nominal data?

Answer 8

data as categories (like boys and girls in a class)

Question 9

what is ordinal data?

Answer 9

unsafe data placed in rank order

scale of 1-10

Question 10

what is interval data?

Answer 10

numerical and scales of measure (like length and temperature)

Question 11

what is statistical test used for?

Answer 11

• to see if data is significant

- whether null hypothesis should be accepted or rejected

Question 12

what is the related experimental design?

Answer 12

repeated measures and matched pairs

Question 13

what is the unrelated experimental design?

Answer 13

independant groups

Question 14

what is the sentence to remember the tests?

Answer 14

carrots
should
come
mashed
with
suede
under 
roast 
potatoes