Dr. Ben Hartlage Stats & Operations Analysis Return to all tools

BUS-2150 · Chapter labs

Four labs. One evidence workflow.

Use focused chapter labs when the learning goal is a complete decision process: begin with a reproducible case, commit to a prediction, examine the evidence, and explain what the result supports.

Predict Explore Explain

Chapter lab directory

Choose the evidence question.

These labs are organized by chapter because each one practices a specific reasoning sequence. General-purpose explorers remain directly available from the main tool directory.

Live tool 01 / Chapter 1

Study Design & Bias Lab

Diagnose selection, measurement, confounding, processing, and time-related threats before trusting a study's numerical results.

  • Study design
  • Bias repair
Open lab
Live tool 02 / Chapters 7–8

Inference & Business Decision Lab

Connect confidence intervals and tests to practical thresholds, assumptions, and responsible one-population business decisions.

  • Intervals
  • Hypothesis tests
Open lab
Live tool 03 / Chapters 9 & 12

Comparing Groups Lab

Compare proportions, means, paired results, and variances, then extend the workflow to one-way ANOVA and follow-up comparisons.

  • Two samples
  • ANOVA
Open lab
Live tool 04 / Chapter 11

Categorical Risk Lab

Analyze a two-way table with chi-square, expected counts, cell contributions, observed risks, and relative risk.

  • Chi-square
  • Relative risk
Open lab