Inferential statistics

Question 1

What are inferential statistics?

Answer 1

make inferences about the population based on the samples tested
-The tests allow us to infer that a pattern in the data is likely to be due to chance so the hypothesis can be accepted and rejected

Question 2

What are the 4 levels of measurments?

Answer 2

-Nominal
-Ordinal
-Interval
-Ratio

Question 3

What is step one of inferential statistics

Answer 3

Look if the data is nominal or ordinal + (ordinal, interval and ratio)

Question 4

What is step 2 of inferential statistics?

Answer 4

If the reaserchh is correlation or difference

Question 5

What is a difference in inferential statistics?

Answer 5

A test for difference means that changes in one variable brings out another
A cause and effect relationship between variables

Question 6

What is correlation in inferential statistics?

Answer 6

Relationship between variables isn’t always due to casual link

Question 7

What design was used in your research?

Answer 7

-Independent measures- independant data
-Repeated measures- Related
-Repeated measures- Related

Question 8

How do we use the correct test- Acronym

Answer 8

I- Independant data (independent measures)
Really- Related data (Repeated measures/ matched pairs)
Could- Correlation
Not- Nominal Data
Calculate- Chi-squared test
Sums- Sign test
On- Ordinal data
Monday- Mann Whitney U test
Without- Wilcoxon
Smiling- Spearman’s rho

Question 9

Test table?

Answer 9

Indene Related Correl
-ndant Data ation
data MP
IM RM

Nom Chi Sign
ial squared test
Data test

Ordi Mann Wilcoxon
nal Whitney Spea
Data U test rman
Rho

Question 10

What is probability expressed as?

Answer 10

P

Question 11

What do you do after the inferential test is carried out?

Answer 11

decide if we reject or accept the hypothesis to do this we determine the probability level

Question 12

What is the standard probability?

Answer 12

0.05

Question 13

What’s the stringent level of probability?

Answer 13

In medical research

Question 14

What should a good scientific theory be?

Answer 14

Falsifiable, its ability to be proven wrong or right

Question 15

What should we do once we have inferential test findings?

Answer 15

if its significant (not due to chance)
Or if its non significant (due to chance)

Question 16

What should we do with hypothesis if findings are significant?

Answer 16

Accepting the alternative and reject the null hypothesis

Question 17

What should we do with hypothesis if findings are non-significant?

Answer 17

Accept the null and reject the alternative

Question 18

How do we find if findings are significant and non signifant?

Answer 18

By comparing our observed (calculated) value with our critical values
In some tests the calculated/observed value must be equal to or less then critical value. Or observed must be more or equal to critical value

Question 19

Spearman’s rho rules for significance?

Answer 19

Observed values must be equal to or greater than critical value to be signifinces

Question 20

Chi squared test rules for significance?

Answer 20

Observed value of X>2 must be equal to or greater than critical value shown

Question 21

Sign test rule for significance?

Answer 21

Observed value must be equal to or less than critical value

Question 22

Wilcoxon test rule for significance?

Answer 22

Observed value must be equal to or less than critical value

Question 23

Mann-Whitney U test rule for significance?

Answer 23

Observed value must be equal to or less than critical value