Stratified and cluster sampling

STA 121. Practice questions, not past papers.

Lessons

• Stratify for subgroup representation
• Sample clusters

Practice questions

1. Proportionate stratified allocation assigns nh as what?

   Statistics study edition practice item Q234; Source: T98-100

2. In one-stage cluster sampling, after selecting clusters one observes what?

   Statistics study edition practice item Q235; Source: T98-100

3. Strata must be what?

   Statistics study edition practice item Q236; Source: T98-100

4. Why can cluster sampling be statistically less efficient than SRS?

   Statistics study edition practice item Q237; Source: T98-100

5. Use proportionate stratified allocation with N=500, stratum size=140, total sample=50. Find the stratum sample size.

   Statistics study edition practice item Q238; Source: T98-103

6. Use proportionate stratified allocation with N=600, stratum size=200, total sample=60. Find the stratum sample size.

   Statistics study edition practice item Q239; Source: T98-103

7. Use proportionate stratified allocation with N=1200, stratum size=420, total sample=200. Find the stratum sample size.

   Statistics study edition practice item Q240; Source: T98-103

8. In stratified sampling, a sample is drawn from _____ stratum.

   Statistics study edition practice item F078; Source: T98-100

9. In one-stage cluster sampling, all units in selected _____ are observed.

   Statistics study edition practice item F079; Source: T98-100

Topic gap report