7.5 Tables, Rosters, and Log Interpretation
Key Takeaways
- Table questions measure careful scanning as much as arithmetic.
- Read the title, date range, column headings, row labels, and footnotes before choosing numbers from a roster or log.
- Many table errors come from using the wrong row, wrong time period, or wrong category column.
- The same row can support different correct answers depending on the category the question names.
- Tables combine reading comprehension, problem solving, and basic math in one item.
Turning a Table Into the Right Answer
Corrections work runs on lists: rosters, movement logs, shift assignments, property sheets, count sheets, incident summaries, program schedules, and transport manifests. A written exam can use a table to test reading and arithmetic at the same time. The math is often easy, but the table can hide the right numbers among similar labels.
Work the table in a fixed order. First read the title and time period — a weekly incident table is not a single-day log. Second find the correct row — do not mix housing units, posts, or shifts. Third read the column heading — a column labeled assigned is not present; a column labeled returned may exclude new arrivals; a total column may include categories the question wants excluded. Fourth check footnotes, which define abbreviations or note that a category is counted elsewhere. Fifth read the question verb to learn whether you add, subtract, compare, or rank.
| Step | What to check | Why it matters |
|---|---|---|
| 1 | Title and date range | Prevents using the wrong time period |
| 2 | Row label | Prevents mixing units, posts, or shifts |
| 3 | Column heading | Separates assigned, present, absent, total |
| 4 | Footnote or rule | Identifies exclusions or special categories |
| 5 | Question verb | Shows whether to add, subtract, compare, or rank |
A reliable practice habit is to cover the answer choices until you know what number or comparison you need. Distractors are built around predictable mistakes — using the total column instead of the pending column, or the assigned count instead of present. The method is: table first, question second, calculation third, answer choice last.
Tables also test whether you can read down a column versus across a row. A row tells you everything about one unit; a column tells you one category across all of them. "How many releases did Unit C have" is a single cell; "total releases facility-wide" sums a column; "Unit A's net change" combines several cells in one row. Deciding whether you need a cell, a row sum, or a column sum before touching the numbers eliminates most table errors, because the wrong-direction answer is usually one of the offered choices.
Worked Example: Reading a Movement Log
Use this sample Monday movement log to answer the questions a real item would ask.
| Unit | Arrivals | Transfers Out | Releases | Court Trips | Returns from Court |
|---|---|---|---|---|---|
| A | 5 | 3 | 2 | 4 | 3 |
| B | 2 | 1 | 0 | 6 | 6 |
| C | 4 | 0 | 3 | 2 | 1 |
Net assignment change for Unit A. Assignment changes only with arrivals, transfers out, and releases: 5 − 3 − 2 = 0. Court trips and returns affect presence during the day, not net assignment.
People from Unit A still away at the end of the day. Compare court trips and returns: 4 left, 3 returned, so 4 − 3 = 1 remained away. The same row gave two different answers because the question named a different category.
Which unit had the largest net assignment change? Compute each: A = 5 − 3 − 2 = 0; B = 2 − 1 − 0 = +1; C = 4 − 0 − 3 = +1. B and C tie at +1, A is 0. If the question asks for the largest increase, the answer is a tie between B and C; reread to see whether it wants increase, decrease, or absolute size before answering.
Total arrivals across the facility. Add the Arrivals column only: 5 + 2 + 4 = 11. Do not accidentally add the Court Trips column, which is a different category.
Facility-wide people still away at day's end. Subtract per unit, then sum: A = 4 − 3 = 1, B = 6 − 6 = 0, C = 2 − 1 = 1, for a facility total of 2 still out. Unit B sent six to court and got all six back, netting zero — a tempting distractor is the 6 court trips alone, ignoring returns. Returns cancel trips only within the reporting window the table covers.
Maximum, minimum, and rank items
When a question asks for the most or fewest of one category, scan that single column rather than totaling everything. For "which unit had the fewest releases," read the Releases column: A = 2, B = 0, C = 3, so Unit B had the fewest. If two columns tie, the question's exact wording — fewest releases, lowest rate, or lowest total movement — breaks the tie. Footnotes can also change the answer: if a footnote states that returns are already included in a present-count column elsewhere, do not add them again. The discipline of locating the right cell before computing is what these items actually grade.
Reading a count sheet or shift roster
The same method transfers to a shift roster — posts down the side, officers and start and end times across the top. A common item asks how many posts are uncovered at a given clock time: scan the start and end columns, mark which posts have an officer whose window includes that time, and count the rest. Treat a count sheet the same way — the headers tell you which figure is rated capacity, which is assigned, and which is the verified count, and the question's verb tells you whether to subtract (to find empty beds or a discrepancy) or read a single cell.
Using the Monday log, what is the net assignment change for Unit A (arrivals 5, transfers out 3, releases 2, court trips 4, returns 3)?
From the same Monday log, how many people from Unit A were still away from the unit at the end of the day?
What should you read before selecting numbers from a roster table?