A teacher has collected the following data about... | Information and Communication Technology (9-1) 0983 | Paper 1 Mock 21 | Theory

Question 1 Report

A teacher has collected the following data about student test scores.

Subject	Number of students scoring A*-C	Number of students scoring D-G
Mathematics	45	15
English	38	22
Science	42	18
History	30	30

(a) State which type of chart would be most suitable to compare the number of A*-C and D-G grades across subjects. Give a reason. [2]

(b) Describe two features the teacher should include to make the chart clear and easy to read. [2]

(c) Explain why a pie chart would not be suitable for displaying this data. [2]

Answer

Answer Details

(a) The most suitable chart type:

A grouped (clustered) bar chart would be most suitable for comparing A*-C and D-G grades across subjects. [1]
It allows direct comparison of two categories (A*-C and D-G) side by side for each subject, making differences between the grade bands and between subjects easy to see at a glance. [1]

(b) Two features to make the chart clear:

A legend (key) showing which colour represents A*-C grades and which represents D-G grades, so the reader can identify the bars correctly. [1]
A clearly labelled Y-axis stating 'Number of students' with appropriate scale markings (for example, in intervals of 5 or 10 up to 50). [1]

(c) Why a pie chart would not be suitable:

A pie chart can only show proportions of a single total, not the comparison between two separate categories across multiple subjects simultaneously. [1]
With four subjects and two grade categories, the pie chart would need to show eight segments, which would be confusing and would not clearly show the side-by-side comparison the teacher wants to make. [1]

A teacher has collected the following data about student test scores. Subject Number of students scoring A*-C Number of students scoring D-G Mathematics 45 ...