MODULE 1 - OVERVIEW OF STATISTICS Flashcards
5 hierarchical scales from smallest to largest
- sampling unit
- sample
- observation unit
- statistical population
- population of interest
what is a sampling unit?
the scale at which you are selecting things at random
what is a sample?
the collection of sampling units you actually collected
what is a statistical population?
the collection of sampling units that could have been in your sample based on your study design
what is a population of interest?
defined by your research question rather than study design
ideally, the same thing as the statical population
what is an observation unit?
the unit from which you directly collect data
sometimes the same thing as the sampling unit
what is a measurement variable?
what we want to measure about the observation unit
eg. height, age, or voting intent
what is a measurement unit?
the scale of the measurement variable
eg. cm for height, years for age
Match the definition with the correct scale
A. The population you hope to make a statement about
B. The type of data you are collecting
C. The unit you collect data from
D. The scale of the measurement variable
E. The collection of all sampling units that were selected
F. The unit that is selected at random
G. The collection of all sampling units that could be selected to be in your sample
A. population of interest
B. measurement variable
C. observation unit
D. measurement unit
E. sample
F. sampling unit
G. statistical population
4 steps of the overall framework of statistics
- sampling
- measuring
- calculating descriptive statistics
- calculating inferential statistics
what is descriptive statistics?
used to characterize the date you collect
what is inferential statistics?
used to draw conclusions about the statistical population
