The dataset below shows the marks of 30 students- What is the cumulative frequency of the classes-a- 10-15b- 45-50Whline ClassMarks - Frequency- Whine10-15 - 2 WWhline15-20 - 2Whline20-25 - 4Whline25-30 - 3 WWhe 30-35 - 5 WWhline35-40 - 7 Wline 40-45 - 6 WWhline45-50 - 1Whe end array

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Cumulative Frequency

The dataset b...

Question

The dataset below shows the marks of 30 students. What is the cumulative frequency of the classes:
a. 10-15
b. 45-50

$\begin{matrix} C l a s s (M a r k s) & F r e q u e n c y 10 - 15 & 2 15 - 20 & 2 20 - 25 & 4 25 - 30 & 3 30 - 35 & 5 35 - 40 & 7 40 - 45 & 6 45 - 50 & 1 \end{matrix}$

0, 30

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2, 30

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2, 1

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0, 28

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Solution

The correct option is B 2, 30
Cumulative frequency is the sum of all previous frequencies up to the current point. Hence, cumulative frequency of class
$a . 10 - 15 = 2$
$b . 45 - 50 = 2 + 2 + 4 + 3 + 5 + 7 + 6 + 1 = 30$

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Similar questions

Which of the following shows the correct histogram for the given data:
$\begin{matrix} Class interval & 20 - 25 & 25 - 30 & 30 - 35 & 35 - 40 & 40 - 45 & 45 - 50 Frequency & 30 & 24 & 52 & 28 & 46 & 100 \end{matrix}$

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$\begin{matrix} Class interval & 20 - 25 & 25 - 30 & 30 - 35 & 35 - 40 & 40 - 45 & 45 - 50 Frequency & 30 & 24 & 52 & 28 & 46 & 100 \end{matrix}$

Q. Find the mean from the following frequency distribution of marks at a test in statistics:

Marks (x):	5	10	15	20	25	30	35	40	45	50
No. of students (f):	15	50	80	76	72	45	39	9	8	6

Consider the marks obtained by 20 students out of 100 marks in a science quiz

30 40 50 35 55 60 40 30 60 75

75 60 30 40 60 55 35 50 40 30

What is the frequency of 40 marks?

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The dataset below shows the marks of 30 students. What is the cumulative frequency of the classes: a. 10-15 b. 45-50 Class(Marks)Frequency10−15215−20220−25425−30330−35535−40740−45645−501

The correct option is B 2, 30Cumulative frequency is the sum of all previous frequencies up to the current point. Hence, cumulative frequency of class a.10−15=2 b.45−50=2+2+4+3+5+7+6+1=30

The dataset below shows the marks of 30 students. What is the cumulative frequency of the classes:
a. 10-15
b. 45-50

$\begin{matrix} C l a s s (M a r k s) & F r e q u e n c y 10 - 15 & 2 15 - 20 & 2 20 - 25 & 4 25 - 30 & 3 30 - 35 & 5 35 - 40 & 7 40 - 45 & 6 45 - 50 & 1 \end{matrix}$

The correct option is B 2, 30
Cumulative frequency is the sum of all previous frequencies up to the current point. Hence, cumulative frequency of class
$a . 10 - 15 = 2$
$b . 45 - 50 = 2 + 2 + 4 + 3 + 5 + 7 + 6 + 1 = 30$