OpenCyber AcademyLesson map
Lesson 18. Map, example, EX064.
flowchart TD
P["Prose: 6 of 20 drafts, interval roughly 15 to 52 percent"] --> N["Not a line of Lab S"]
L["Lab S first row: successes=3/20"] --> N
The mailbox sentence and the first Wilson row use different numerators.
Logical drawing
prose numerator: 6 of 20 drafts
prose interval words: roughly 15–52%
Lab S first row: successes=3/20 rate=0.150 wilson95=[0.052, 0.360]
Lab S does not print 6
Learning outcomes
After this chapter, you should be able to:
- Keep Omar's 6-of-20 sentence in the pilot narrative.
- Keep 3/20 as the first Wilson row.
- Refuse a fourth Wilson row whose numerator is 6.
18.1 The mailbox test is described in words. The script's first row is a different count.
The worked pilot says Omar prepared 20 test messages for mailboxes T1–T5, and that 6 of the 20 drafts included an attachment suggestion. The same passage gives the interval in words: roughly 15–52 percent. Sending was disabled, so the sentence also says nothing left the tenant. Those clauses are prose. They sit in the chapter about permission and in the later adoption paragraph. They are not format strings.
Lab S's first call is wilson(3, 20). The printed line is successes=3/20 rate=0.150 wilson95=[0.052, 0.360]. The numerator is 3. A reader who pastes 6 into that line, or who pastes "roughly 15–52%" under the three Wilson rows as if the script had printed it, has built a column the file does not contain. The script also prints 30/200 and 300/2000. It does not print 6, 15, or 52.
Both facts can stand. The pilot sentence records a synthetic mailbox exercise. The Wilson rows record the function's own inputs. They must not be stacked into one table with a shared numerator.
Lesson table; scroll horizontally to read all columns →
| Object | Numerator it actually uses |
|---|---|
| Pilot sentence | 6 drafts out of 20 |
| First Wilson row | 3 out of 20 |
| Second and third Wilson rows | 30 and 300 |
| A row for 6 | Not printed |
18.2 Worked example
Lesson table; scroll horizontally to read all columns →
| Edit someone proposes | Decision |
|---|---|
| Leave "6 of 20" in the pilot paragraph | Keep |
| Leave "roughly 15–52%" beside that sentence | Keep |
Insert successes=6/20 under the Wilson block |
Refuse |
| Replace 3/20 with 6/20 because both feel like "about 20 trials" | Refuse |
Synthetic case. Both counts are invented for the book. Neither count is a client incident.
Errors and limits
Similar denominators are a common way to weld two measurements into one. Here the numerators disagree, and only one of them is a script column.
Apply
- EX064 — Two numerators. Where does 6 of 20 live, and what does Lab S print instead?
Show marking criteria
Rubric: 3 = 6 of 20 and roughly 15–52% are prose about the drafts; Lab S prints 3/20, 30/200 and 300/2000; it does not print 6;; 2 = prose versus the first Wilson row;; 1 = names one numerator;; 0 = adds a 6/20 Wilson row.