EduNinja

[Maximum number: 6]

(a)

200 students estimate the volume, $V \mathrm{~m}^{3}$ , of a classroom. The cumulative frequency diagram shows their results.

Figure for Question (a) — CAIE IGCSE Mathematics Extended

Use the graph to find an estimate of

[ 2 ]

(i)

the interquartile range,

___ m^3

[ 2 ]

(b)

The 200 students also estimate the total area, $A \mathrm{~m}^{2}$ , of the windows in the classroom. The table shows their results.

Table for Question (b) — CAIE IGCSE Mathematics Extended

[ 4 ]

(i)

Calculate an estimate of the mean.

You must show all your working.

___ m^2

[ 4 ]

Mid-values 40, 80, 125, 200 soi
$\sum fx$ with correct frequencies and x's in correct intervals or on boundaries of correct intervals
$\div 200$
106 nfww
SC2 for correct answer without working.

[Maximum number: 1]

The heights, h metres, of the 120 boys in an athletics club are recorded.
The table shows information about the heights of the boys.

Table for Question 2 — CAIE IGCSE Mathematics Extended

Write down the modal class.
$<h \leqslant$

$1.5<h\leqslant1.6$

CAIE IGCSE Mathematics Extended E9.3 Averages and Measures of Spread Topic Practice

Question 1

Question (a)

Question (i)

Question (b)

Question (i)

Question 2