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What is a stem and leaf plot in math?

A Stem and Leaf Plot is a special table where each data value is split into a “stem” (the first digit or digits) and a “leaf” (usually the last digit).

How do you do a stem and leaf plot?

To create the plot, divide each observation of data into a stem and a leaf. The leaf consists of a final significant digit. For example, 23 has stem two and leaf three. The number 432 has stem 43 and leaf two.

Do stem and leaf plots have to be in order?

Usually, a stem and leaf plot is ordered, which simply means that the leaves are arranged in ascending order from left to right. Also, there is no need to separate the leaves (digits) with punctuation marks (commas or periods) since each leaf is always a single digit.

How do you do a stem and leaf plot on word?

Click into the first cell in the table and type “Stem” or your preferred header for that column. Press the “Tab” key to move you into the next cell, the second header. Type “Leaf” or “Leaves” or your preferred header. If you created a table with additional columns, type those headers.

How do you do a stem and leaf plot in SPSS?

Use the Analyze > Descriptive Statistics > Explore menu to produce stem and leaf plots. If you specify a categorical variable in the Factor List a stem-and-leaf plot for each group will be displayed. Note that Explore lets you produce other plots (boxplots and histograms) and quite a number of summary statistics.

What is stem width in stem and leaf plot?

The “stem” labeled “0″ is for all the leaves with single digit widths between 0 and 9 cm, the “stem” labeled “1” is for all the leaves with widths between 10 and 19 cm wide, and the “stem” labeled “2″ is for all the leaves with widths between 20 and 29 cm wide. And so on for each leaf in your data set.

How do I make a Boxplot in SPSS?

Go to Graphs > Chart Builder. In the Choose from: menu, click on Boxplot. Drag the first image in the middle lower pane into the upper pane. Now drag ADIPOSITY from the upper left pane into the field on the y-axis (vertical axis) of the boxplot.

How do you read box plots?

The median (middle quartile) marks the mid-point of the data and is shown by the line that divides the box into two parts. Half the scores are greater than or equal to this value and half are less. The middle “box” represents the middle 50% of scores for the group.

How do you identify outliers in SPSS box plots?

To check for outliers in SPSS:

  1. Analyze > Descriptive Statistics > Explore…
  2. Select variable (items) > move to Dependent box.
  3. Click Statistics… >
  4. In Output window: Go to Boxplot > Look at circles and *.
  5. If there are circles or *, then there are potential outliers in your dataset.

Why box plot is used?

A box and whisker plot (sometimes called a boxplot) is a graph that presents information from a five-number summary. It is often used in explanatory data analysis. This type of graph is used to show the shape of the distribution, its central value, and its variability.

Why box plots are used in data mining?

A box plot shows only a simple summary of the distribution of results so that you can quickly view it and compare it with other data. Use a box plot in combination with another statistical graph method, like a histogram, for a more thorough, more detailed analysis of the data.