Question

22 which of the dot plots shows a symmetric distribution? a 9 10 11 12 13 14 15 16 17 18 19 20 b 1 2 3 4 5 6 7 8 9 10 11 12 c 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 d 9 10 11 12 13 14 15 16 17 18 19 20

Explanation:

A symmetric distribution means that the data is evenly distributed around the center. In a dot - plot, if we can draw a vertical line through the center and the left side is a mirror image of the right side, it is symmetric.

• For option A: If we consider the center around 14, the left side (from 10 to 13) and the right side (from 15 to 18) have a relatively symmetric pattern of dot frequencies.
• Option B: The red lines and the dot distribution do not show symmetry.
• Option C: The dot frequencies on the left (1.2 - 1.5) and right (1.6 - 1.8) are not symmetric.
• Option D: The dot frequencies on the left (10 - 13) and right (18 - 19) are not symmetric.

Answer:

A.