Evidence · Intermediate · About 6 min
Resolution A four-day, 32-hour standard work week should replace the current five-day, 40-hour model
ten volunteer office teams with 120 workers tried a 32-hour week for four weeks.
A percentage is a share of a specific group. Say who the group is. Two percentages can both be correct and still answer completely different questions.
Know the difference between a count, a percent change and a percentage-point change. The math is usually easy. Picking the right number decides what you are actually claiming.
Practice record
72 ÷ 90 = 80% of respondents preferred the shorter week.
72 ÷ 120 = 60% of all workers reported that preference. The 30 nonrespondents’ views are unknown.
Is it people, jobs, tasks or a rate?
Keep the comparison group in the sentence.
Percentage points and percent change are not the same.
Resolution A four-day, 32-hour standard work week should replace the current five-day, 40-hour model
ten volunteer office teams with 120 workers tried a 32-hour week for four weeks.
72 of 90 respondents preferred the shorter week: 80%.
This is about the 90 people who answered, not everyone.
72 of all 120 workers reported that preference: 60%.
We know nothing about the 30 who didn’t answer. Saying “all workers” overstates it.
Tasks rising from 100 to 104 is a 4% relative increase.
This measures output. Don’t mix it with the survey numbers.
A correct number still needs the right claim attached to it.
Resolution A four-day, 32-hour standard work week should replace the current five-day, 40-hour model
ten volunteer office teams with 120 workers tried a 32-hour week for four weeks.
Calculate each group’s shortlist rate and the percentage-point difference. Explain one claim this arithmetic cannot establish.
Resolution Meritocracy as practiced in modern societies is a harmful fiction that should be rejected
twenty of 100 applicants received interview coaching.
You can type or use your keyboard’s microphone to dictate. Your text stays editable. Practice is optional.
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Coached: … Uncoached: … Difference: … This does not establish…
Use the timer for a spoken attempt if it helps. Practice without recording, then note what you would improve.
Speaking is self-reviewed. No microphone or recording is required.
Resolution Meritocracy as practiced in modern societies is a harmful fiction that should be rejected
Calculate each group’s shortlist rate and the percentage-point difference. Explain one claim this arithmetic cannot establish.
twenty of 100 applicants received interview coaching.
You can return to the practice whenever you want.
Eight of 20 coached applicants is 40%; 12 of 80 uncoached applicants is 15%. The difference is 25 percentage points. The arithmetic establishes a rate difference in this practice record, not that coaching caused it; qualifications and allocation were not compared.
The coached group contains 20 applicants.
The uncoached group has a different size.
Subtracting rates gives a percentage-point difference.
Each rate uses its own group’s denominator. The answer distinguishes a measured difference from the explanation for it, leaving the observation available for a further argument.
Choose one move to improve, revise your response, then try it aloud.
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