inferential tests

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Psychology

12th

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33 Terms

1
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what is nominal data?
categorical data (eg. hair colours)
2
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what is ordinal data?
in a sequence (eg. a rating scale)
3
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what is interval data?
data in an order with a measurable distance (eg. cm or seconds)
4
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what is the sign test looking for?
a difference
5
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what is the experimental design of a sign test?
repeated measures
6
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what is the level of measurement for a sign test?
nominal data
7
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how do you conduct a sign test?

1. Have a table of data with the before and after conditions and the number of participants (No.)
2. Look at each row of the table and if the second condition is a higher score then put a + if it is lower put a –
3. Any scores that are the same discount that participant from the analysis
4. Add up the number of + and –
5. Take the least frequent sign and call this the S value (this is called the calculated / observed value)
8
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how to work out if a sign test result is significant?
Calculated S (at 0.05) must be equal or less than the critical value for significance shown on the table
9
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what is a two tailed hypothesis?
non-directional
10
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what is a one-tailed hypothesis?
directional
11
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what is a chi-square test looking for?
a difference or association
12
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what is the experimental design for a chi-squared test?
independent groups
13
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what is the level of measurement for a chi-squared test?
nominal data
14
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what information do you need for a Chi-squared test?

1. the calculated value of x
2. the degrees of freedom
15
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how do you calculate the degrees of freedom?
(rows-1) x (columns-1)
16
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what is a Mann-Witney test looking for?
difference
17
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what is the experimental design of a Mann-Witney test?
independent groups
18
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what is the level of measurement for a Mann-Witney test?
ordinal data
19
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what is a Wilcoxon test looking for?
a difference
20
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what is the experimental design of a Wilcoxon test?
repeated measures
21
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what is the level of measurement of a Wilcoxon test?
ordinal
22
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what is an Unrelated T test looking for?
a difference
23
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what is the experimental design of an Unrelated t test?
independent groups
24
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what is the level of measurement for an Unrelated t test?
interval data
25
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what is a related t test looking for?
a difference
26
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what is the experimental design of a related t test?
repeated measures
27
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what is the level of measurement for a related t test?
interval data
28
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what is a spearman’s (Rho) test looking for?
a relationship or correlation
29
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what is the experimental design spearman’s (Rho) test?
2 naturally occurring variables
30
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what is the level of measurement for a spearman’s (Rho) test?
one variable is ordinal
31
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what is a Pearsons test looking for?
a relationship or correlation
32
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what is the experimental design of a Pearsons test?
2 naturally occurring variables
33
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what is the level of measurement for a Pearsons test
both variables are interval