Question

Convert
the following table into cumulative frequency table.

X	$11$	$12$	$23$	$34$	$56$	$78$
F	$0$	$1$	$2$	$3$	$5$	$6$

Answer 1

The cumulative frequency is calculated from a
frequency table, by adding each frequency to the total of the frequencies of
all data values before it in the data set.

X	F	Cumulative frequency(cf)
$11$	$0$	$0$
$12$	$1$	$0+1=1$
$23$	$2$	$2+1=3$
$34$	$3$	$3+3=6$
$56$	$5$	$6+5=11$
$78$	$6$	$11+6=17$