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Complete the following steps to interpret a tally analysis. Key output includes counts, percents, cumulative counts, cumulative percents, and the sample size.
First, you can examine the list of unique values that are included in each column of data. This list can be useful if you did not know all the possible data values. You can also use the list to identify data-entry errors.
The count represents the number of times each unique value occurs. The percent represents the percent contribution for each category. Minitab also displays N, which is the number of non-missing observations in the sample. If the column contains any missing observations, Minitab also displays their count.
| Size | Count | Percent | CumCnt | CumPct |
|---|---|---|---|---|
| Short | 9 | 8.41 | 9 | 8.41 |
| Tall | 61 | 57.01 | 70 | 65.42 |
| Grande | 16 | 14.95 | 86 | 80.37 |
| Venti | 21 | 19.63 | 107 | 100.00 |
| N= | 107 |
In these results, 107 drink orders are summarized by the size of the drink. The tall size was ordered most frequently, with 61 orders, or 57.01% of all the orders. The short size beverage was ordered least frequently, with only 9 orders, or 8.41% of the total.
When you use cumulative counts and percents, you should confirm that the sequential order of the values in the table is appropriate. By default, Minitab lists the values in alphabetical order. To change the value order, go to Change the display order of text values in Minitab output.
| Size | Count | Percent | CumCnt | CumPct |
|---|---|---|---|---|
| Short | 9 | 8.41 | 9 | 8.41 |
| Tall | 61 | 57.01 | 70 | 65.42 |
| Grande | 16 | 14.95 | 86 | 80.37 |
| Venti | 21 | 19.63 | 107 | 100.00 |
| N= | 107 |
In these results, 86, or 80.37% of all drink orders are the short, tall, or grande size.
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