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Statistical Inference · Part 1 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.
A council measures the daily water use of a random sample of 50 households in Wellington. State the population and the sample.
For the water-use study, explain the difference between a parameter and a statistic, using the median as your example.
A student says, “My sample median is 165 L, so the median for all Wellington households is exactly 165 L.” Explain why this is wrong, using the idea of sampling variability.