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What is a column (one-grouping variable) table?
In a column data table your groups are defined by one scheme, perhaps "control vs. treated." You can have more than two groups in a one-way table, for example "placebo vs. low-dose vs. high-dose."
Analyses from a one-way table:
| • | t test (one-sample, paired and unpaired) |
| • | Column statistics (including normality tests) |
| • | One-way ANOVA (followed by Tukey, Dunnett, Newman-Keuls or Bonferroni post tests) |
Graph types from a column table:
Example of a one-way table:
| • | Each column defines a treatment group. |
| • | Prism does not use a separate column to enter the grouping variable. Instead the groups are defined by columns. |
| • | If data are not matched or paired, rows have no special meaning. Enter data in any order you like. |
| • | If data are from a before-after experiment with clear pairing or matching, place each set of matched results on one row. Optionally, use the row title to label it. |
| • | Blue italics values are “excluded” (ignored by analyses and graphs). Use Exclude Values. |
Error bars
For one-way tables, Prism will calculate error values and create error bars automatically. Enter all the values for a data set in a single column.
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If you have already calculated your error values for a one-way graph and you want to enter your values in Mean and Error columns, choose to make a grouped table but only enter data into the top row, so that there is only one value in each column.
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