INFERENTIAL TESTS (STATISTICAL TESTS)

Question 1

WHEN TO USE MANN WHITNEY U

Answer 1

TESTING FOR SIGNIFICANT DIFFERENCE

DATA = ORDINAL OR INTERVAL

OBTAINED VALUE IS LESS THAN OR EQUAL TO CRITICAL VALUE

(INDEPENDENT GROUPS)

0 ORDINAL OR
I INTERVAL
I INDEPENDENT GROUPS
S SIGNIFICANT

Question 2

WHEN TO USE SPEARMAN’S RANK

Answer 2

TEST OF CORRELATIONS AND RELATIONSHIPS

DATA = ORDINAL +

RELATED DATA

OBTAINED VALUE IS MORE THAN OR EQUAL TO CRITICAL VALUE

(REPEATED MEASURES)

C CORRELATIONS
O ORDINAL
R REPEATED MEASURE

Question 3

WHEN TO USE CHI SQUARED

Answer 3

TEST OF SIGNIFICANT DIFFERENCE

DATA = NOMINAL

UNRELATED DATA

OBTAINED VALUE GREATER OR EQUAL TO CRITICAL VALUE

(INDEPENDENT GROUPS)

S SIGNIFICANT
U UNRELATED DATA
N NOMINAL
I INDEPENDENT GROUPS

Question 4

WHAT ARE INFERENTIAL TEST USED FOR

Answer 4

TO TEST THE SIGNIFICANCE OF RESULTS EG WHETHER OR NOT TO REJECT A NULL HYPOTHESIS

Question 5

WHAT DATA DO YOU NEED TO WORK OUT WHICH TEST IS APPROPRIATE TO USE

Answer 5

• THE LEVEL OF DATA MEASUREMENT COLLECTED
• THE PARTICIPANT DESIGN OF THE EXPERIMENT
• WHETHER THE RESEARCH IS LOOKING FOR A DIFFERENCE OR A CORRELATION BETWEEN THE TWO GROUPS