Unit 16: Statistical Survey and Scales of Measurement Flashcards
Four Scales of Measurement:
- Nominal
- Ordinal
- Ratio
- Interval
Four Scales of Measurement:
- Nominal
- Ordinal
- Ratio
- Interval
- Whole numbers
- Cannot be analyzed mathematically
- Ex. Jersey number
Nominal
- Whole numbers
- Cannot be analyzed mathematically
- Ex. Jersey number
Nominal
- Denote positions in order
* Cannot be mathematically organized
Ordinal
- Denote positions in order
* Cannot be mathematically organized
Ordinal
- Equal distance between values
- Can be mathematically analyzed
- Negative numbers
Interval
- Equal distance between values
- Can be mathematically analyzed
- Negative numbers
Interval
- Equal distance between values
- Can be mathematically analyzed
- No negative numbers
Ratio
- Equal distance between values
- Can be mathematically analyzed
- No negative numbers
Ratio
Discrete values:
Nominal and Ordinal
Discrete values:
Nominal and Ordinal
Continuous variables:
Interval and ratio
Continuous variables:
Interval and ratio
Parametric tests can be done on:
Ratio and interval
Parametric tests can be done on:
Ratio and interval
T-test:
- Comparing means of two different groups
* Increased # of t-tests results in type 1 error
T-test:
- Comparing means of two different groups
* Increased # of t-tests results in type 1 error
Counteracting the problem of multiple comparisons:
Bonferroni Adjustment
Counteracting the problem of multiple comparisons:
Bonferroni Adjustment
Analysis of variance:
- Means of several groups are equal?
- Giant t-test
ANOVA
Analysis of variance:
- Means of several groups are equal?
- Giant t-test
ANOVA
- Compares between group variance to within group variance
* Will be larger than one
F-Static
Same participants used in each condition
More statistically powerful than between-groups design
Less error-less individual differences or within-groups variance (trait error)
Half as many people
Repeated Measures ANOVA
Measuring the impact of more than one independent variable on a dependent variable
ANOVA w >1 Independent Variable
