Histograms & Dot Plots
Median & Mean
Shape of Distributions
A Gallery of Data
Measures of Center & Variability
100
This type of graph uses equal-width bars to show how data falls into intervals.
What is a histogram?
100
The middle number in an ordered data set.
What is the median?
100
When data is evenly spread around the center, the shape is called this.
What is symmetric?
100
A graph that shows data using X’s, dots, or other marks above a number line.
What is a dot plot?
100
The difference between the largest and smallest values.
What is the range?
200
This plot uses dots above a number line to represent data points.
What is a dot plot?
200
The sum of all numbers divided by how many there are.
What is the mean (average)?
200
A distribution with most of its data to the left and a tail to the right is called this.
What is skewed right?
200
This type of graph is helpful to show the spread and outliers with a five-number summary.
What is a box plot (or box-and-whisker plot)?
200
This is the "typical" value that balances the data set.
What is the mean?
300
In a histogram, this is what the height of each bar represents.
What is frequency (or number of data points in that interval)?
300
If you add a very large number to a data set, this measure will be pulled higher.
What is the mean?
300
In a symmetric distribution, these two measures of center are about the same.
What are the mean and median?
300
This type of graph uses vertical bars but each bar represents a category, not a range.
What is a bar graph?
300
This measure of spread shows how far data points are from the mean.
What is standard deviation?
400
If two histograms have the same shape but different heights, this might be different about them.
What is sample size (or number of data points)?
400
A data set has 5 numbers: 4,10,2,8,6 The median is this.
What is 6?
400
This shape looks like a hill, often called a "bell curve."
What is normal distribution?
400
A graph where points are plotted to show relationships between two variables.
What is a scatterplot?
400
If the range is 10 and the smallest number is 2, the largest number must be this.
What is 12?
500
This plot makes it easiest to see each individual data value.
What is a dot plot?
500
This measure of center is better to use when there are outliers.
What is the median?
500
When data has two distinct peaks, the shape is called this.
What is bimodal?
500
A picture-based graph where each symbol represents a set number of items.
What is a pictograph?
500
The set of numbers that divides ordered data into four equal parts.
What are quartiles?