Form a less than cumulative frequency table.
x
10-20
20-30
30-40
40-50
frequency
4
5
6
12

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Solution

X

Frequency

C.f

$10 - 20$

$4$

Less than $20 = 4$

$20 - 30$

$5$

Less than $30 = 9$

$30 - 40$

$6$

Less than $40 = 15$

$40 - 50$

$12$

Less than $50 = 27$

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X	Frequency	C.f
$10 - 20$	$4$	Less than $20 = 4$
$20 - 30$	$5$	Less than $30 = 9$
$30 - 40$	$6$	Less than $40 = 15$
$40 - 50$	$12$	Less than $50 = 27$

Form a less than cumulative frequency table.x10-2020-3030-4040-50frequency45612

X Frequency C.f 10−20 4 Less than 20=4 20−30 5 Less than 30=9 30−40 6 Less than 40=15 40−50 12 Less than 50=27

Form a less than cumulative frequency table.
x
10-20
20-30
30-40
40-50
frequency
4
5
6
12

X

Frequency

C.f

$10 - 20$

$4$

Less than $20 = 4$

$20 - 30$

$5$

Less than $30 = 9$

$30 - 40$

$6$

Less than $40 = 15$

$40 - 50$

$12$

Less than $50 = 27$