1. Construct a cumulative frequency table of the plant height data in Table 10.5 and draw a cumulative graph. Determine the lower quartile, upper quartile, median and inter-quartile range of the data.

2. The pre-names of pupils in a class were:

(a) Draw up a tally chart for the lengths of the names of the pupils and from it construct

(i) A bar chart 

(ii) Dot plot to represent the data

(b) Calculate the mean and median of the data set and find its inter-quartile range.

(c) Estimate the mode of the data using the approximation

Transcribed Image Text:

Height (mm) 0-14 15-24 25-34 35-44 45-54 55-64 65-74 75-84 85-94 95-104 TOTAL Frequency 0 1 0 3 315 4 4 1 1 20 Table 10.5 Height of plants