10.1 to 10.3 Review

Which dot plot shows more variability? a or b?

• a
• b

What is the MAD of the dot plot shown?

• 0.8

• 1.1

• 0.5

• 4

• 3

• 9%

• 9

To do market research, a telemarketing firm randomly selected 1000 names from a store's database and contacted them. Classify the sampling method.

• simple random

• systematic

• voluntary response

• convenience

Bob asks 10 of his friends to determine what

percentage of students participate in sports.

• simple sample

• systematic sample

• voluntary sample

• convenience sample