BUAL EXAM ONE Chen Yan Questions and Correct Verified Answers
Data - Answer-facts and figures from which conclusions can be drawn
Data Set - Answer-the data that are collected for a particular study
EX. maybe people, objects, events, or other entries
Variable - Answer-any characteristic of an element
Quantitative - Answer-he possible measurements of the values of a variable are numbers
that represent quantities
-Numerical
-How many and how much
Qualitative (categorical) - Answer-the possible measurements fall into several categories:
categorical
o Weight of a package
o Size
o Time
Cross-sectional data - Answer-data collected at the same or approximately the same point in
time
Time series data - Answer-data collected over different time periods
Population - Answer-a set of all elements about which we wish to draw conclusions
Sample - Answer-a subset of the elements of a population
, Sample size - Answer-..
probability sampling - Answer-sampling where we know the chance that each element in the
population will be included in the sample
§ Required for statistical inference
§ Cluster
§ Systematic
§ Stratified
non-probability sampling - Answer-sampling where we select elements because they are
convenient to sample
Convenience sampling - Answer-sampling where we select elements because they are
convenient to sample
Voluntary sampling - Answer-samples in which participants self-select
Judgement sampling - Answer-samples in which a person who is extremely knowledgeable
about the population selects population elements he or she feels are most representative
Nominative - Answer-qualitative, A qualitative variable for which there is no meaningful
ordering, or ranking, of the categories
§ Gender, Car
Ordinal - Answer-qualitative, A qualitative variable for which there is a meaningful ordering,
or ranking, of the categories
§ Teaching effectiveness
Interval - Answer-quantitative, Same as ordinal plus...Measurements are on a numerical
scale with an arbitrary zero point, can only meaningfully compare values by the interval
between them
Data - Answer-facts and figures from which conclusions can be drawn
Data Set - Answer-the data that are collected for a particular study
EX. maybe people, objects, events, or other entries
Variable - Answer-any characteristic of an element
Quantitative - Answer-he possible measurements of the values of a variable are numbers
that represent quantities
-Numerical
-How many and how much
Qualitative (categorical) - Answer-the possible measurements fall into several categories:
categorical
o Weight of a package
o Size
o Time
Cross-sectional data - Answer-data collected at the same or approximately the same point in
time
Time series data - Answer-data collected over different time periods
Population - Answer-a set of all elements about which we wish to draw conclusions
Sample - Answer-a subset of the elements of a population
, Sample size - Answer-..
probability sampling - Answer-sampling where we know the chance that each element in the
population will be included in the sample
§ Required for statistical inference
§ Cluster
§ Systematic
§ Stratified
non-probability sampling - Answer-sampling where we select elements because they are
convenient to sample
Convenience sampling - Answer-sampling where we select elements because they are
convenient to sample
Voluntary sampling - Answer-samples in which participants self-select
Judgement sampling - Answer-samples in which a person who is extremely knowledgeable
about the population selects population elements he or she feels are most representative
Nominative - Answer-qualitative, A qualitative variable for which there is no meaningful
ordering, or ranking, of the categories
§ Gender, Car
Ordinal - Answer-qualitative, A qualitative variable for which there is a meaningful ordering,
or ranking, of the categories
§ Teaching effectiveness
Interval - Answer-quantitative, Same as ordinal plus...Measurements are on a numerical
scale with an arbitrary zero point, can only meaningfully compare values by the interval
between them
