L22 · Random sampling

1. 1.

   Is this sampling method random? The school emails a survey to every 10th student on the roster.

   Answer. random (systematic from a list)

   random (systematic from a list)

2. 2.

   Is this sampling method random? A teacher puts every student’s name in a hat and draws 10.

   Answer. random

   random

3. 3.

   Is this sampling method random? A reporter asks only the first 8 fans at the front of a line.

   Answer. not random (convenience)

   not random (convenience)

4. 4.

   Is this sampling method random? A teacher puts every student’s name in a hat and draws 10.

   Answer. random

   random

5. 5.

   Is this sampling method random? A reporter asks only the first 8 fans at the front of a line. Write a complete answer — Malik will compare with a partner.

   Answer. not random (convenience)

   not random (convenience)

6. 6.

   Is this sampling method random? A reporter asks only the first 8 fans at the front of a line. Write a complete answer — Malik will compare with a partner.

   Answer. not random (convenience)

   not random (convenience)

7. 7.

   Is this sampling method random? The school emails a survey to every 10th student on the roster. Write a complete answer — Priya will compare with a partner.

   Answer. random (systematic from a list)

   random (systematic from a list)

8. 8.

   Is this sampling method random? A teacher puts every student’s name in a hat and draws 10. Write a complete answer — Ava will compare with a partner.

   Answer. random

   random

9. 9.

   Is this sampling method random? A reporter asks only the first 8 fans at the front of a line. Write a complete answer — Ava will compare with a partner.

   Answer. not random (convenience)

   not random (convenience)

10. 10.

    Is this sampling method random? The school emails a survey to every 10th student on the roster. Write a complete answer — Elena will compare with a partner.

    Answer. random (systematic from a list)

    random (systematic from a list)

11. 11.

    Think

    Grace tried this problem:
    Is this sampling method random? A teacher puts every student’s name in a hat and draws 10.
    Grace wrote random (check this). That is not correct. What is the right answer?

    Answer. random

    Grace’s answer random (check this) is off. random

12. 12.

    Think

    Sam tried this problem:
    Is this sampling method random? The school emails a survey to every 10th student on the roster.
    Sam wrote random (systematic from a list) (check this). That is not correct. What is the right answer?

    Answer. random (systematic from a list)

    Sam’s answer random (systematic from a list) (check this) is off. random (systematic from a list)

Original extra practice. Keys are computed from the items, not guessed.