A dot plot shows the number of books read last month: 1, 2, 2, 3, 3, 3, 8, 9. Which statement best describes the data?

The data is clustered from 1 to 3.

The data has a gap between 2 and 3.

Draw Inferences from Data Practice — Grade 7 math

Lesson 2: Draw Inferences from Data — Practice Questions

1. A dot plot shows the number of pets owned by students: 0, 1, 2, 1, 3, 1, 2. The peak of this data set is ___.
2. The scores on a science quiz are: 5, 6, 7, 7, 12, 13, 13. A gap in the dot plot exists between the values 7 and 12. The largest whole number in this gap is ___.
3. When analyzing a dot plot, which feature represents the data value that occurs with the greatest frequency?
- A. The cluster
- B. The gap
- C. The peak
- D. The outlier
4. A dot plot shows the number of books read last month: 1, 2, 2, 3, 3, 3, 8, 9. Which statement best describes the data?
- A. The data has a peak at 9.
- B. The data is clustered from 1 to 3.
- C. The data has a gap between 2 and 3.
- D. The data has no outliers.
5. A dot plot shows points scored in a game. Score 10 has two dots, score 20 has five dots, score 30 has four dots, and score 50 has one dot. The peak score is ___.
6. Two classes took the same test. Class A's scores had a median of 85 and an IQR of 10. Class B's scores had a median of 80 and an IQR of 20. What can be concluded?
- A. Class A had higher scores on average and were more consistent.
- B. Class A had higher scores on average, but were less consistent.
- C. Class B had higher scores on average and were more consistent.
- D. Class B had higher scores on average, but were less consistent.
7. The box plot for daily sales at Store 1 shows Q1 at 150 dollars and Q3 at 210 dollars. The box plot for Store 2 shows Q1 at 160 dollars and Q3 at 200 dollars. What is the IQR for Store 1? ___ dollars
8. The box for a dataset of fish lengths has its lower end (Q1) at 8 cm and its upper end (Q3) at 14 cm. The whiskers extend to a minimum of 5 cm and a maximum of 19 cm. What is the interquartile range? ___ cm
9. Two sets of data are compared using box plots. Both plots have the exact same median value. Which statement must be true?
- A. The data sets have the same range.
- B. The data sets have the same interquartile range.
- C. The center of both data sets is the same.
- D. Both data sets have the same shape.
10. A farm compares the weights of two breeds of chickens. Breed A's weights have Q1=4 lbs and Q3=7 lbs. Breed B's weights have Q1=5 lbs and Q3=9 lbs. How much greater is the IQR for Breed B than for Breed A? ___ lbs