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Vocabulary
Categorical Variables
Quantitative Variables
Graphs
Discrete Variables
100
It contains all of the elements of interest in a particular study.
What is the population?
100
The variable Class - freshman, sophomore, junior, senior - is one of these.
What is an ordinal variable?
100
These are a tip-off to identifying a quantitative variable?
What are units?
100
The variable of interest is on the horizontal axis and the frequency on the vertical axis of this old favorite.
What is a histogram?
100
On this table, outcomes and their associated chance of occurring are listed.
What is a probability distribution?
200
It is a characteristic of interest for the elements.
What is a variable?
200
Your SAT score is an example of this type of variable.
What is an interval categorical variable?
200
These are the three values of interest in most quantitative graphs.
What are center, spread, and shape?
200
You'll need to know the five-number summary to make this one by hand.
What is a box plot?
200
The experiment of counting the difference colors of cars at a toll booth is one of these types of variables.
What is a discrete random variable?
300
These data are collected all at one point in time.
What is cross-sectional data?
300
This variable expresses a relationship between two quantitative variables, such as the Price/Earnings Ratio.
What is ratio categorical variable?
300
We use this to describe the center of a skewed distribution.
What is a median?
300
We can summarize data for two variables with this one.
What is a cross-tabulation?
300
It is the measure of central tendency for a discrete distribution.
What is the expected value?
400
The facts and figures collected, analyzed, and summarized for presentation and interpretation.
What are data?
400
They are the two graphs that we can create to visually describe categorical variables.
What is a box plot and a pie chart?
400
It is the range of values for the middle 50% of a distribution.
What is the IQR?
400
But don't make this error when reading a cross tabulation!
What is Simpson's Paradox?
400
It is the chance of getting two heads when you toss a coin twice.
What is one-fourth?
500
For a sample with several classes, it is the frequency of the class divided by the sample size.
What is the relative frequency?
500
With this type of chart, we need to know what "100%" is equal to if we wish to drill down into the data.
What is a pie chart.
500
The exact values appear on both of these, unlike a histogram where we can only estimate values.
What are dot plots and stem-and-leaf plots?
500
You will have to pay attention to the leaf unit on this one.
What is a stem and leaf plot?
500
These are the two conditions that must be satisfied for a discrete probability function.
What are [0<=p(x)<=100] and [sum of p(x) = 100]?