Skills & Planning

Practical guides to documents, data, creative work, and everyday planning.

Showing 85–96 of 102 guides

Weighted average calculations that combine group totals and counts instead of averaging two group means without their sizes.
9 min read

Check weighted average calculations before combining group results

To find the average page count across two collections of books, add their total pages and divide by their combined number of books. When you have each collection's mean instead of its total, multiply that mean by the number of books it describes. The counts matter: a collection of eight books contributes more observations than a collection of two. Simply averaging their reported means gives both collections equal influence, which answers a different question. For weighted average calculations , verify each step.

observational drawing practice: checking proportions against a subject during a drawing exercise.
8 min read

Use observational drawing practice to compare proportions

When a drawing looks wider or taller than its reference photograph, small details can distract from the correction it needs. Put the drawing beside the existing photograph and compare the outer boundaries first. Keep that photograph unchanged throughout the exercise. You are checking whether the drawing preserves the relationships visible in one image, including the spaces between features, rather than reconstructing the subject's physical dimensions.

Presentation slide planning that organizes a recommendation around the audience's decision and evidence needed to evaluate it.
9 min read

Use presentation slide planning to explain a recommendation

How do you turn a recommendation into slides that someone else can evaluate? Start by stating the decision you want the audience to make, then show the reasoning that supports it. Effective presentation slide planning gives each slide a specific job: establish the problem, explain relevant evidence, expose uncertainty, or connect those points to a proposed action. The finished deck should let a listener understand why you recommend something and where they might reasonably disagree.