Mathematics and Statistics

Quick Revision in Maths and Statistics Syllabus D Grade 12 (Part one)

Hello Everyone, we have decided  to do a quick revision with you in Mathematics on the topic called Statistics. The question we are going to revise was taken from a 2017 Mathematics Paper 2 .

 Que:The table below shows the amount of money spent by 100 learners at school on a particular day.

Amount in Kwacha	0<xS5	5 < x f 10	10 < x f 15	15 < x S 20	20 < x S 25	25 < x S 30
Frequency	13	27	35	16	7	2

(a)Calculate the standard deviation(6marks)

                                                                       SOLUTION

Amount in Kwacha

0<xS5

5 < x f 10

10 < x f 15

15 < x S 20

20 < x S 25

25 < x S 30

Frequency

13

27

35

16

7

2