The dot plots below show the test scores of sixth- and seventh-grade students:
Dot plot for Grade 6 shows 6 dots on score 70, 4 dots on score 80, 6 dots on score 90, and 4 dots on score 100. Dot plot for Grade 7 shows 5 dots on score 50, 7 dots on score 60, 4 dots on score 70, and 4 dots on score 80.
Based on visual inspection of the dot plots, which grade, if any, appears to have the higher mean score? (1 point)
Grade 6
Grade 7
Both groups show about the same mean score.
No conclusion about mean score can be made from the data.
5 answers
Based on visual inspection of the dot plots, Grade 6 appears to have the higher mean score.
The dot plots below show the distances traveled by two groups of skaters:
Two dot plots are labeled Group X and Group Y. The horizontal axis is labeled Distance Traveled and marked from 15 to 40 at increments of 5 for both dot plots. Group X shows 3 dots on 20, 7 dots on 25, 1 dot on 30, 2 dots on 35, 5 dots on 40. Group Y shows 3 dots on 15, 2 dots on 20, 6 dots on 25, 4 dots on 30, and 3 dots on 35.
Which of the following inferences can be made using the dot plots? (1 point)
Group X has a higher mean than group Y.
Group Y has a higher mean than group X.
There is no overlap between the data.
The range of each group is different.
Two dot plots are labeled Group X and Group Y. The horizontal axis is labeled Distance Traveled and marked from 15 to 40 at increments of 5 for both dot plots. Group X shows 3 dots on 20, 7 dots on 25, 1 dot on 30, 2 dots on 35, 5 dots on 40. Group Y shows 3 dots on 15, 2 dots on 20, 6 dots on 25, 4 dots on 30, and 3 dots on 35.
Which of the following inferences can be made using the dot plots? (1 point)
Group X has a higher mean than group Y.
Group Y has a higher mean than group X.
There is no overlap between the data.
The range of each group is different.
Group X has a higher mean than group Y.
Jason wants to compare the mean height of the players on his favorite hockey and volleyball teams. He creates the dot plots shown below:
First dot plot is labeled Height of Hockey Players and shows 1 cross on 67, 1 cross on 69, 2 crosses on 70, 2 crosses on 71, 4 crosses on 72, 5 crosses on 73, 3 crosses on 74, 2 crosses on 76, and 1 cross on 78. Second dot plot is labeled Height of Volleyball Players and shows 1 cross on 73, 1 cross on 75, 1 cross on 76, 2 crosses on 78, 2 crosses on 79, 2 crosses on 80, 2 crosses on 81, 2 crosses on 82, and 3 crosses on 84
The mean absolute deviation is 1.83 inches for the hockey team and 2.53 inches for the volleyball team. Which of the following conclusions can be drawn from the data? (1 point)
There is more variability in hockey team member heights.
There is more variability in volleyball team member heights.
The hockey players are all taller than the volleyball players.
The volleyball players are all taller than the hockey players.
First dot plot is labeled Height of Hockey Players and shows 1 cross on 67, 1 cross on 69, 2 crosses on 70, 2 crosses on 71, 4 crosses on 72, 5 crosses on 73, 3 crosses on 74, 2 crosses on 76, and 1 cross on 78. Second dot plot is labeled Height of Volleyball Players and shows 1 cross on 73, 1 cross on 75, 1 cross on 76, 2 crosses on 78, 2 crosses on 79, 2 crosses on 80, 2 crosses on 81, 2 crosses on 82, and 3 crosses on 84
The mean absolute deviation is 1.83 inches for the hockey team and 2.53 inches for the volleyball team. Which of the following conclusions can be drawn from the data? (1 point)
There is more variability in hockey team member heights.
There is more variability in volleyball team member heights.
The hockey players are all taller than the volleyball players.
The volleyball players are all taller than the hockey players.
There is more variability in volleyball team member heights.