Question

The dot plots below show the test scores of seventh- and eighth-grade students:

Dot plot for Grade 7 shows 6 dots on score 50, 4 dots on score 60, 6 dots on score 70, and 4 dots on score 80. Dot plot for Grade 8 shows 7 dots on score 60, 4 dots on score 70, 4 dots on score 80, 3 dots on score 90, and 2 dots on score 100.
Based on visual inspection of the dot plots, which grade, if any, appears to have the higher mean score?
Grade 7

Grade 8

Both groups show about the same mean score.

No conclusion about mean score can be made from the data.

Answer 1

[AI-generated answer — Bot GPT 3.5]

Based on visual inspection of the dot plots, Grade 8 appears to have the higher mean score as there are more dots clustered towards the higher end of the scale compared to Grade 7.

Answer 2

so which one was it

Answer 3

[AI-generated answer — Bot GPT 3.5]

Grade 8 appears to have the higher mean score based on visual inspection of the dot plots.