Variable Types
This variable represents data that is represented through grouping. It isn't limited to numerical data.
What is a Categorical variable?
The average result of all data points. It is used to describe the center of a graph or plot.
What is the mean?
Jeopardy Slides: Slide 2
What is a Box plot?
The probability of this area is 1.
What is P(S)?
Denoted as "alpha", this value depends on the confidence level, and is used to reject or accept the null hypothesis depending on if the p-value found during a hypothesis test is less than or greater than this value.
What is a Significance Level?
This type of variable only allows two possibilities.
What is a Binary Variable?
This Normal Distribution has a tail on the right side of it.
(How would you describe the graph?)
What is Right-skewed?
Jeopardy Slides: Slide 3
What is a Histogram?
The probability of the area outside of A.
What is P(A^c)?
This distribution can be drawn based soley on the mean and standard deviation. It is the most commonly used distribution.
What is a Normal Distribution?
This variable represents numerical data for which performing mathematical operations on the data makes sense.
What is a Quantitative Variable?
This distribution is the most commonly used form of the Bell curve. It has a mean of 0 and a standard deviation of 1.
What is a Standard Normal Distribution?
Jeopardy Slides: Slide 4
What is a Bar Graph?
The probability of the purple Area where A and B overlap.
What is P(A and B)?
This decision error is the official name for a false negative, which is when we reject something even if that something is True.
What is a Type 1 Error?
This variable occurs when the data takes the form of ordered descriptions.
Ex) Sad, Happy, Angry
Ex) Bad, Normal, Good
What is an Ordinal Variable?
The distance between each data point and the mean indicates how spread out the data is.
What is the standard deviation/variance?
Jeopardy Slides: Slide 5
What is a Stem Plot?
The probability of the green, purple, and blue areas.
What is P(A or B)?
This theorem states that the sample proportion will be nearly normally distributed with a mean equal to the population proportion "p", and a standard deviation equal to sqrt( p(1-p)/n ).
What is the Central Limit Theorem?
These two variables are the subtypes of Quantitative variables.
One occurs when measuring something, and the other occurs when counting something.
Please name them in this order.
What are Continuous and Discrete Variables?
The difference between the values at the 75th percentile of the data and the 25th percentile of the data. Often abbreviated and visualized using Box plots.
What is the Inquartile Range/IQR?
This category of graphs occurs when trying to represent more than one variable.
Some graphs within this category are Scatter plots, and combinations of Bar graphs and Box plots.
What are Bivariate graphs/plots?
The probability of the purple area given the blue area.
What is P(A | B)?
This values is represented with a capital R, and ranges from -1 to 1. It is used to show in what ways two variables are correlated, and how much so.
What is a Correlation Coefficient?