Basic Terms
The entire collection of individuals about which information is sought
What is a Population?
This sampling method follows some type of pattern to create the sample
What is Systematic?
This is the general name for variables that are always numeric
What is Quantitative?
This is the lowest level of measurement. A variable measured at this level has categories with no natural ranking or ordering.
What is Nominal?
Population or sample:
Every statistics student at FDTC.
What is a Population?
The subset of a population containing the individuals that are actually observed
What is a Sample?
This two word sampling method is analogous to a lottery
What is Simple Random?
This is the broad name for variables used to classify individuals into categories
What is Qualitative?
This is the next higher level of measurement after the nominal level. A variable is measured at the ordinal level if its values do have a natural ranking or ordering.
What is Ordinal?
Continuous or Discrete?
Blood pressure
What is Continuous?
The characteristics of individuals about which we collect information are called
What are Variables?
Identify the kind of sample that is described:
Five placement exam testing locations were selected at random and all students at those locations were asked their opinion about the new calculator guidelines.
What is Cluster?
A ______ variable is a numerical variable whose possible values can be listed
What is Discrete?
This level has the property of a meaningful 0 value. Such a value represents an absence of the quantity being measured.
What is Ratio?
Determine whether the data described are nominal or ordinal:
Bed sizes are twin, queen, and king.
What is Ordinal?
In a _________ neither the investigators nor the subjects know who is getting which treatment.
This type of sample is one in which the population is divided into groups and a random sample is drawn from each group.
What is Continuous?
For a variable at this level, differences between values are meaningful, but there is no meaningful 0 value.
What is Interval?
Indicate the level of measurement for the variable below (nominal, ordinal, interval, or ratio):
Distance (in miles) from home to the nearest all-night convenience store
What is Ratio?
A study in which the assignment to treatment groups is not made by the investigator is called _________
What is an Observational Study?
This is a type of sample that is not drawn by a well-defined random method
What is Convenience?
Social Security Numbers are an example of this type of variable (Qualitative or Quantitative)
What is Qualitative?
Which level of measurement (Nominal, Ordinal, Interval, or Ratio) is the following variable measured at?
Temperature in Fahrenheit
What is Interval?
0 degrees F does not mean the absence of heat
Identify the kind of sample that is described (Simple Random, Convenience, Systematic, Cluster, Stratified):
A salary committee for a Midwestern multi-college district selected 3 colleges in their district at random, then polled all employees in those colleges regarding the proposed benefit package.
What is Cluster?