Chapter 4 Flashcards
(35 cards)
What are descriptive statistics?
Methods of summarizing the data in an informative way.
What are measures of central tendency?
Mean, median, mode.
What are measures of dispersion?
Range, standard deviation, variance, interquartile range.
What are inferential statistics?
Methods to draw conclusions.
Which 5 types of inferential statistics are there?
Mean difference, Chi-square, Analysis of variance, Regression analysis, Logit analysis.
Which four statistical techniques are there?
Ratio,
Interval,
Ordinal,
Nominal.
When do you use an Chi-square test?
Independent: Nominal/Ordinal
Dependent: Nominal/Ordinal
When doe you use an T-test or ANOVA?
Independent: Nominal/Ordinal
Dependent: Interval/Ratio
When do you use an Logit analysis?
Independent: Interval/Ratio
Dependent: Nominal/Ordinal
When do you use an Regression analysis?
Independent: Interval/Ratio
Dependent: Interval/Ratio
Which four steps make up the sampling process?
1, define the population
2, determine the sampling frame
3, determine the sampling design,
4, determine sample size
What is an sampling frame?
Physical representation of the target population.
Which two coverage errors are there?
Under-coverage,
Miss-coverage.
Which solutions to coverage errors are there?
If small do nothing,
If large redefine population.
Which two types of sampling designs are there?
Probability sampling,
Non-probabilty sampling.
What is probability sampling?
When each element of the population has a known change of being selected as a subject.
What is non-probability sampling?
When the elements of the population do not have a known change of being selected.
Why use/don’t use probability sampling?
Results generalizable to population,
More time and resource intensive.
Why use/don’t use non-probability sampling?
Less time and resource intensive,
Results not generalizable to population.
Which four types of probability sampling are there?
1, Simple random sampling
2, Systematic sampling
3, Stratified sampling
4, Cluster sampling
Which four types of non-probability sampling are there?
1, Convenience sampling
2, Quota sampling
3, Judgment sampling
4, Snowball sampling
What is systematic sampling?
Pick every .. element.
What is stratified sampling?
Divide population in equal groups then apply SRS.
What is Simple random sampling?
Each population element has an equal chance of being choosen.
