choosing a statistical test✅

Question 1

what is a statistical test?

what are the 3 factors that decide which statistical test?

Answer 1

• the outcome of a ST has implications for whether we accept or reject the null hypothesis

1- difference or correlation
2- experimental design
3- level of measurement

Question 2

1- difference for correlation:

what is it concerned with?

what can it include ?

Answer 2

• the aim of the experiment, obvious from the wording of the hypothesis
• correlational analyses and investigations that are looking for an association

Question 3

2- experimental design:

what are the 3 types of design?

which 2 are related designs, which are unrelated?

Answer 3

• independent groups
• matched pairs
• repeated measures
• MP AND RM are related, IG is unrelated, because the same ppts are used for the first two but different for IG.

Question 4

3- levels of measurement:

what are the 3 levels?

what is the table to remember?

Answer 4

• ordinal = ordered
• nominal = categories
• interval = scales

level of measurement: central measure of dispersion:
tendency:
nominal → mode → n/a
ordinal → median → range
interval → mean →. standard deviation

Question 5

what is the table need to remember for choosing a statistical test?

whats the anagram to remember it by?

Answer 5

⎪ test of difference: ⎪
⎪ unrelated design ⎪ related design ⎪ test of correlation
_______________________________________________
nominal ⎪ chi - squared. ⎪ ☆ sign test ☆. ⎪ chi - squared
ordinal ⎪ mann - whitney ⎪ Wilcoxon ⎪. spearmans rho
interval ⎪ unrelated t - test. ⎪ related t - test ⎪. pearsons R

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