Lemma
EasySampling & experiments
OpenStax, Introductory Statistics 2e §1.2 Data, Sampling, and Variation in Data and Sampling · Try It 7 · Statistics · Sampling & experiments

Data, Sampling, and Variation in Data and Sampling · Try It 7

Determine the type of sampling used (simple random, stratified, systematic, cluster, or convenience).
A high school principal polls 50 first-year students, 50 sophomores, 50 juniors, and 50 seniors regarding policy changes for after school activities.

Its source prints no answer for this problem, so there's nothing to check against.

~5 minWritten answer · compare with the solution

OpenStax, Introductory Statistics 2e · §1.2 Data, Sampling, and Variation in Data and Sampling · Try It 7

Stuck? A gentle nudge

No hints for this one.

Something off?
Workspace
Your working

Check your full solution

Upload photos of your handwritten work or a PDF, and Lemma will read it and tell you whether it's right — and where it first goes wrong if not.