Statistics for Business & Decision Making
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What the Question Really Is & Describing Data
Turning a vague question into a measurable one
Preview
Describing data: averages, spread and shape
Practice: visual honesty
3 lessons
Variation & Sampling
Variation: why numbers move on their own
Sampling: when part tells you about the whole
Practice: auditing a sample
3 lessons
Uncertainty & Confidence Intervals
Why every estimate needs a range
Confidence intervals in spreadsheets
Practice: replacing an exact number with an honest range
3 lessons
Comparing Groups & Effect Size
Comparing two groups: is the difference real?
Effect size: is the difference big enough to matter?
Practice: a comparison you can explain
3 lessons
Relationships & Causation
Correlation and regression
Correlation is not causation
Practice: testing a causal claim
3 lessons
Experiments & Communicating Results
Designing an A/B test before launch
Communicating results to decision-makers
Practice: your experiment plan and decision brief
3 lessons
Comparing Groups & Effect Size
Comparing two groups: is the difference real?
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