Extra Set

Grade 6 · Unit 7 · L33 · Version A · AF9E

Choosing measures of center and variability

Name ________________

Date ________________

Period ________________

1.
A data set of 9 quiz scores has one score of 0 and the rest near 18. Which measure of center is more resistant to that 0: mean or median?
Answer. median
The median depends on the middle value, not the size of an outlier.
2.
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD?
Answer. Class B
Greater spread means a greater mean absolute deviation.
3.
A data set of 9 quiz scores has one score of 0 and the rest near 18. Which measure of center is more resistant to that 0: mean or median?
Answer. median
The median depends on the middle value, not the size of an outlier.
4.
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD?
Answer. Class B
Greater spread means a greater mean absolute deviation.
5.
A data set of 9 quiz scores has one score of 0 and the rest near 18. Which measure of center is more resistant to that 0: mean or median? Write a complete answer — Ava will compare with a partner.
Answer. median
The median depends on the middle value, not the size of an outlier.
6.
A data set of 9 quiz scores has one score of 0 and the rest near 18. Which measure of center is more resistant to that 0: mean or median? Write a complete answer — Mei will compare with a partner.
Answer. median
The median depends on the middle value, not the size of an outlier.
7.
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD? Write a complete answer — Elena will compare with a partner.
Answer. Class B
Greater spread means a greater mean absolute deviation.
8.
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD? Write a complete answer — Sam will compare with a partner.
Answer. Class B
Greater spread means a greater mean absolute deviation.
9.
A data set of 9 quiz scores has one score of 0 and the rest near 18. Which measure of center is more resistant to that 0: mean or median? Write a complete answer — Mei will compare with a partner.
Answer. median
The median depends on the middle value, not the size of an outlier.
10.
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD? Write a complete answer — Luis will compare with a partner.
Answer. Class B
Greater spread means a greater mean absolute deviation.
11.
Think
Sam tried this problem:
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD?
Sam wrote Class B (check this). That is not correct. What is the right answer?
Answer. Class B
Sam’s answer Class B (check this) is off. Greater spread means a greater mean absolute deviation.
12.
Think
Ava tried this problem:
Two classes have the same mean score. Class A’s scores are tightly clustered; Class B’s are spread out. Which class has the greater MAD?
Ava wrote Class B (check this). That is not correct. What is the right answer?
Answer. Class B
Ava’s answer Class B (check this) is off. Greater spread means a greater mean absolute deviation.

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

L33 · Choosing measures of center and variability