L24 · Compare populations

1. 1.

   Class A has median 18 and IQR 4. Class B has median 22 and IQR 4. Which class typically scored higher?

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (22 vs 18).

2. 2.

   Class A has median 12 and IQR 4. Class B has median 17 and IQR 4. Which class typically scored higher?

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (17 vs 12).

3. 3.

   Class A has median 20 and IQR 4. Class B has median 23 and IQR 4. Which class typically scored higher?

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (23 vs 20).

4. 4.

   Class A has median 14 and IQR 4. Class B has median 17 and IQR 4. Which class typically scored higher?

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (17 vs 14).

5. 5.

   Class A has median 12 and IQR 4. Class B has median 19 and IQR 4. Which class typically scored higher? Write a complete answer — Luis will compare with a partner.

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (19 vs 12).

6. 6.

   Class A has median 14 and IQR 4. Class B has median 22 and IQR 4. Which class typically scored higher? Write a complete answer — Nora will compare with a partner.

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (22 vs 14).

7. 7.

   Class A has median 14 and IQR 4. Class B has median 21 and IQR 4. Which class typically scored higher? Write a complete answer — Sam will compare with a partner.

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (21 vs 14).

8. 8.

   Class A has median 17 and IQR 4. Class B has median 22 and IQR 4. Which class typically scored higher? Write a complete answer — Malik will compare with a partner.

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (22 vs 17).

9. 9.

   Class A has median 17 and IQR 4. Class B has median 24 and IQR 4. Which class typically scored higher? Write a complete answer — Priya will compare with a partner.

   Answer. Class B

   Same spread (IQR 4), higher median in Class B (24 vs 17).

10. 10.

    Class A has median 17 and IQR 4. Class B has median 25 and IQR 4. Which class typically scored higher? Write a complete answer — Grace will compare with a partner.

    Answer. Class B

    Same spread (IQR 4), higher median in Class B (25 vs 17).

11. 11.

    Think

    Luis tried this problem:
    Class A has median 14 and IQR 4. Class B has median 22 and IQR 4. Which class typically scored higher?
    Luis wrote Class B (check this). That is not correct. What is the right answer?

    Answer. Class B

    Luis’s answer Class B (check this) is off. Same spread (IQR 4), higher median in Class B (22 vs 14).

12. 12.

    Think

    Grace tried this problem:
    Class A has median 15 and IQR 4. Class B has median 21 and IQR 4. Which class typically scored higher?
    Grace wrote Class B (check this). That is not correct. What is the right answer?

    Answer. Class B

    Grace’s answer Class B (check this) is off. Same spread (IQR 4), higher median in Class B (21 vs 15).

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