Back to Use data from a random sample to draw inferences about a population — Problem 3 · Task Set 18

Drawing Inferences from Random Samples

Work through each section in order. For short response questions, write complete sentences and show your reasoning.

Grade 7·21 problems·~35 min·Common Core Math - Grade 7·standard·7-sp-a-2

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Fluency Practice

A student draws 5 random samples from the same population and gets these proportions: 0.50, 0.55, 0.60, 0.65, 0.60. Which statement best describes these results?

The variation means at least one sample was collected incorrectly.

The variation is normal — different random samples naturally produce different estimates.

All 5 samples should have given exactly the same proportion.

The sample size must have been too small to get consistent results.