Question

5. The marks in a spelling test are shown in this table
(a) Draw a bar graph to represent this set of data.
(b) What mark did most pupils score ?
(C) How many pupils scored 7 or more ?
10 6 7 9 5 7 9 3
13 9 8 7 6 10 7 6
195 10 3 8 8 5 9
7 8 16
6 75
8 7 6 8 107
Draw a double bar graph for the given information:
5
9​

Answer 1

Given : The marks in a spelling test

To Find : Draw a bar graph to represent this set of data.

(b) What mark did most pupils score ?

(C) How many pupils scored 7 or more ?

Solution:

Marks:         6,7,8,9,10

Frequency: 5,4,7,10,4

Marks     Frequency          marks * frequency

6                     5                      30

7                     4                      28

8                     7                      56

9                     10                    90

10                    4                     40

Total               30                    244

Mean Marks = 244/30  = 81.33

Mode = 9      ( frequency 10 is maximum for 9 Marks)

9 Marks most pupil scored

Pupil scored 7 or more

= Total - Scored marks 6

= 30 -5

= 25

A bar chart or bar graph is a chart or graph that presents categorical data with rectangular bars with heights or lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally.

Here we have plotted vertically

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