A student measures the height, , of each of 400 plants.
The cumulative frequency diagram shows the results.
Use the diagram to find an estimate for
the median cm [1]
the interquartile range cm [2]
the 80th percentile cm [2]
the number of plants with a height greater than 60 cm .
The table shows some information about the heights of 200 plants.
Draw a cumulative frequency diagram to show this information.
Find an estimate of the 75th percentile.
80 adults solve the same puzzle as the students.
The cumulative frequency table shows information about the time taken by each adult to solve the puzzle.
On the grid, draw a cumulative frequency diagram.
Use your cumulative frequency diagram to find an estimate for
(a) the median
(b) the lower quartile.
A student measures the height, , of each of 400 plants.
The cumulative frequency diagram shows the results.
Use the diagram to find an estimate for
the number of plants with a height greater than 60 cm .
The table shows some information about the heights of 200 plants.
Find an estimate of the 75th percentile.