The "Average" Joe
This measure of center is found by adding all the data points together and dividing by the number of points in the set.
What is the Mean?
This is the simplest measure of variability, calculated by subtracting the minimum value from the maximum value.
What is the Range?
This type of display uses a number line and "Xs" or dots to show the frequency of each data point.
What is a dot plot?
When data is balanced on both sides of the center, it is said to have this type of "bell-like" shape.
What is symmetrical?
To be considered "statistical," a question must anticipate this among the answers
What is variability (or a variety of a different answers)?
To find this "middle" value, you must first arrange your data set in numerical order from least to greatest.
What is the Median?
This term describes a data point that is significantly higher or lower than the rest of the values in the set.
What is an outlier?
This display, often called a "Whisker Plot," visually shows the median, quartiles, and extremes of a data set.
What is a Box Plot?
This term describes a group of data points that are gathered closely together in one area of a graph.
What is a cluster?
"How tall am I?" is not a statistical question, can you rewrite this to make it a statistical question for a class?
What is "How tall are the students in my class?" or "What is the average height in my class?"
In the data set {2, 5, 8, 10, 15}, this specific number is the median.
What is 8?
To find the Interquartile Range (IQR), you subtract the value of the First Quartile ($Q_1$) from the value of this quartile.
What is the Third Quartile ($Q_3$)?
Unlike a bar graph, this display groups data into equal "intervals" or bins, and the bars usually touch.
What is a Histogram?
This is a "hole" in a data display where no data points exist between other values.
What is a gap?
This is the total number of data values collected in a survey, often represented by the letter "n"
What is the sample size?
If a data set has two middle numbers, such as 4 and 6, you perform this action to find the median.
What is finding the mean of the two middle numbers (or adding them and dividing by 2)?
In a data set where the Q1 is 12 and the Q3 is 20, this is the Interquartile Range.
What is 8?
In a box plot, the entire "box" represents this specific measure of variability.
What is the Interquartile Range (IQR)?
If a distribution is perfectly symmetrical, these two measures of center will be exactly the same.
What are the Mean and Median?
A question like "What is the favorite color of 6th graders?" is statistical because you expect the data to do this.
What is a variety? The data will vary.
Adding a very high "outlier" to a data set will typically cause this specific measure of center to increase the most.
What is the Mean?
While the Range tells you the spread of the entire set, the IQR tells you the spread of this specific percentage of the data.
What is the middle 50%?
If a dot plot has a long "tail" of data points stretching out to the right side, the distribution is described by this term.
What is skewed right?
This measure of variability (often abbreviated as MAD) describes the average distance between each data point and the mean.
What is the Mean Absolute Deviation?
Statistical observations usually describe these two things about a data set: its center and its ______.
What is its spread? or variability?