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Statistical Inference · Part 4 of 4
3 exam-style questions with model answers, plus 3 quick multi-choice questions — every question on this part of the standard, grouped by the 1 page of notes they come from.
Write a full answer before you reveal the model one. That comparison is where the learning happens.
Group A's interval is and Group B's interval is . Do the intervals overlap, and can you make the call?
Sample P (): median 60, , . Build P's interval and compare with Sample Q's interval . State your conclusion.
A study compares median incomes of two towns. The intervals overlap slightly, so no call can be made. Write a conclusion and explain what could be done to reach a call, referring to sampling variability.