Pass Check: Statistical Diagrams
Match the diagram to the data type: bar chart for categories, histogram for grouped continuous data.
Frequency polygon
A line graph joining the midpoints of the tops of bars on a frequency diagram.
Cumulative frequency
A running total of frequencies, used to plot a cumulative frequency graph.
Histogram
A diagram for grouped continuous data where area, not height, represents frequency.
Interquartile range (IQR)
The difference between the upper quartile and lower quartile, showing the spread of the middle 50% of data.
Quick check
Mixed quiz
1. A pie chart represents 50 people. One sector has an angle of 90 degrees. How many people does this sector represent?
2. A pie chart represents 55 people. One sector has an angle of 90 degrees. How many people does this sector represent?
3. A pie chart represents 65 people. One sector has an angle of 90 degrees. How many people does this sector represent?
4. A scatter graph shows negative correlation between hours spent watching TV and exam scores. What does this mean?
5. A pie chart represents 45 people. One sector has an angle of 90 degrees. How many people does this sector represent?
6. A scatter graph shows height and shoe size for several people, with a positive correlation. What does this suggest?
7. A pie chart represents 60 people. One sector has an angle of 90 degrees. How many people does this sector represent?
8. In a back-to-back stem and leaf diagram comparing two classes' test scores, Class A has a smaller range than Class B. What does this suggest about Class A's scores?