What is a back to back stem plot used for?
What is a back to back stem plot used for?
A back-to-back stem-and-leaf plot is a method for comparing two data distributions by attaching two sets of ‘leaves’ to the same ‘stem’ in a stem-and-leaf plot. For example, the stem-and-leaf plot below displays the distribution of pulse rates of 19 students before and after gentle exercise.
How do you draw a stem and leaf diagram?
Tips on how to draw a stem and leaf plot
- On the left hand side of the page, write down the thousands, hundreds or tens (all digits but the last one). These will be your stems.
- Draw a line to the right of these stems.
- On the other side of the line, write down the ones (the last digit of a number).
Why is a back to back stem-and-leaf plot useful?
Stem-and-leaf plots are an effective way to present data, allowing us to see at a glance the distribution of numbers. A back to back stem-and-leaf plot goes one step further and allows for easy comparison of two sets of numbers.
What are data points in back to back stem and leaf plots?
A stem and leaf plot shows the spread and distribution of a data set. A back-to-back stem and leaf plot shows two data sets. The data sets share the same stem and have their own set of leaves.
How do you do a back to back stem-and-leaf plot in Excel?
Use the following steps to create a stem-and-leaf plot in Excel.
- Step 1: Enter the data.
- Step 2: Identify the minimum and maximum values.
- Step 3: Manually enter the “stems” based on the minimum and maximum values.
- Step 4: Calculate the “leaves” for the first row.
- Step 5: Repeat the calculation for each row.
Can you make stem-and-leaf plot excel?
Use the following steps to create a stem-and-leaf plot in Excel. Step 1: Enter the data. Step 2: Identify the minimum and maximum values. Step 3: Manually enter the “stems” based on the minimum and maximum values.
Are stem and leaf plots used for categorical data?
Stem and leaf: For these graphs, the stem represents the first digit of the number and the leaf/leaves represent the second digit(s). However, bar graphs plot categorical data and have gap between each bar, whereas histograms plot numerical data and are continuous (no gaps).
What does a back to back stem plot show?
A stem and leaf plot shows the spread and distribution of a data set. A back-to-back stem and leaf plot shows two data sets. The data sets share the same stem and have their own set of leaves. Example of a double stem and leaf plot created by QI Macros add-in for Excel. It’s easy to create both single and double stem and leaf plots using QI Macros.
How to create a stem and leaf plot?
Generate an online stem and leaf plot, or stemplot, and calculate basic descriptive statistics for a sample data set with 4 or more values and up to 1000 values, all non-negative. Enter values separated by commas such as 1, 2, 4, 7, 7, 10, 2, 4, 5.
What is the function of stem.leaf.backback?
The function stem.leaf.backback creates back-to-back stem and leaf displays. The computed stem and leaf display is printed out.
Why do you use back to back plots?
Back to back stem-and-leaf plots allow for easy comparison of two sets of like data. By breaking your data into ‘stems’ and ‘leaves,’ you can easily find the mode (i.e. the most frequently occurring number in a data set) and median (i.e. the middle number of a data set), as well as other information regarding the distribution of numbers.
