Answer Key — 7.SP.A.2

For parents and tutors

Do not share with students before practice tests.

Practice Problems — Sets 1–10

| Set | Guidance | | --- | --- | | Set 1 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 2 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 3 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 4 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 5 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 6 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 7 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 8 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 9 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 10 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. |

Practice Problems — Sets 11–20

| Set | Guidance | | --- | --- | | Set 11 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 12 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 13 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 14 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 15 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 16 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 17 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 18 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 19 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. | | Set 20 | Use data from a random sample to draw inferences about a population w… — verify written work and accept reasonable drawings. |

Review tiers 1–10

Checklists are parent-judged.
Written items: verify against practice set patterns.
Standard text: Use data from a random sample to draw inferences about a population with an unknown characteristic of interest. Generate multiple samples (or simulated samples) of the same size to gauge the variation in estimates or predictions. For example, estimate the mean word length in a book by randomly sampling words from the book; predict the winner of a school election based on randomly sampled survey data. Gauge how far off the estimate or prediction might be.

Practice test scoring

| Tier | Pass guidance | | --- | --- | | 1–3 | Most oral tasks smooth; majority of written correct | | 4–6 | 7/10+ total with clear understanding | | 7–8 | 9/12+ with explanations | | 9–10 | Near-perfect; ready to move on |

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