Answer:
Student should remove 1 dot from the 5 dots over 21.
Step-by-step explanation:
The hand spans, to the nearest cm, of some students in a class are shown below:
19, 22, 21, 15, 18, 22, 17, 19, 16, 21, 19, 18, 22, 20, 21, 22, 19, 15, 17, 21
The frequency table of given data set is
Observation Frequency
15 2
16 1
17 2
18 2
19 4
20 1
21 4
22 4
Correct dot plot showing 2 dots over 15, 1 dot over 16, 2 dots over 17, 2 dots over 18, 4 dot over 19, 1 dot over 20, 4 dots over 21, and 4 dots over 22.
Student makes 5 dots over 21, which is incorrect.
Student should remove 1 dot from the 5 dots over 21.
