Graph Types by Use
This graph shows the frequency distribution of a data set.
What is a frequency histogram?
This type of graph represents each data point with a mark above a scaled number line.
What is a dot plot?
This is the greatest number that can belong in the class.
What is the Upper Class Limit?
This is the class width of the frequency distribution in question 14 on page 49.
What is 10?
This graph is used to show the change in data over time.
What is a time series chart?
This graph shows data as percents of the whole.
These can be found by taking each class frequency and dividing by the total frequency.
What are the relative frequencies?
These are the midpoints of the frequency distribution in question 14 on page 49.
What are 4.5, 14.5, 24.5, 34.5, 44.5, 54.5, and 64.5?
These 2 graphs are used for categorical data.
What are pie charts and pareto charts.
This graph has cumulative frequency on the vertical axis.
What is an ogive?
This is calculated as the difference between 2 consecutive upper class limits or lower class limits.
What is the class width?
Your frequency distribution has a starting lower class limit of 24 and a class width of 15. These are ALL of the lower class limits and upper class limits if you have 5 classes.
What are; 24, 39, 54, 69, 84 and 38, 53, 68, 83, 98?
This graph emphasizes continuous change in frequencies.
What is a frequency polygon?
These two graphs look exactly the same except for the labels on their vertical axes.
What are frequency histograms and relative frequency histograms?
These are halfway between an upper class limit and the next lower class limit.
What are boundaries?
Your frequency distribution has 5 classes with the following frequencies; 5, 7, 2, 8, 7. These are your cumulative frequencies.
What are; 5, 12, 14, 22, 29?
This graph allows you to see the distribution shape (in groups) AND recreate your original data set.
What is a stem-and-leaf plot?
This graph consists of paired points where x values can be repeated.
What is a scatter plot?
These are the two parts of a frequency distribution that can be used to label the horizontal axis of a frequency histogram.
What are midpoints and boundaries?
You have a frequency distribution with 50 data points. This is the frequency of the class that has a relative frequency of 0.2.
What is 10?