Question 14 Marks
The heights of 45 students measured to the nearest centimetre are given below :
$
\begin{array}{l}
155,166,159,161,158,154,153,159,157,152,160,157,158,170 \\
152,151,162,164,171,154,165,161,150,168,162,154,160,170,163,164 \\
165,169,165,155,157,158,160,161,156,153,150,165,167,169,172
\end{array}
$
Prepare a frequency table taking class intervals
$
150-155,155-160,160-165,165-170,170-175 .
$
View full question & answer→Question 24 Marks
The daily income (in rupees) of 30 workers is given below :
$
\begin{array}{l}
83,96,91,80,97,111,90,83,112,120,103,77,82,90,70 \\
68,89,85,78,105,94,97,90,89,102,113,90,106,70,84
\end{array}
$
Construct a frequency table using groups
$65-75,75-85,85-95,95-105,105-115$, $115-125$.
View full question & answer→Question 34 Marks
The weights (in kg) of 30 students are given below :
$
\begin{array}{l}
48,55,30,43,41,36,48,37,34,38,46,42,38,52,37 \\
34,40,42,50,37,35,46,42,45,43,37,39,45,48,46
\end{array}
$
Form the grouped frequency table by taking class-intervals
$30-35,35-40,40-45,45-50$, $50-55$.
View full question & answer→Question 44 Marks
The fine imposed (in rupees) on 40 pupils for being absent is given below :
$
\begin{array}{l}
18,8,12,6,8,16,12,5,23,2,16,23,2,10,20,12,9,7,0,5 \\
3,6,27,21,19,15,20,24,2,16,14,8,23,24,10,14,3,8,11,2
\end{array}
$
Present the data in the form of frequency distribution table by taking class intervals $0-5,5-10,10-15,15-20,20-25$.
View full question & answer→Question 54 Marks
The marks out of 50, obtained by 30 students of a class in an examination are given below :
$
\begin{array}{l}
40,12,46,37,17,27,30,6,2,23,19,39,25,5,33 \\
19,21,12,41,17,12,19,17,8,10,1,9,21,13,48
\end{array}
$
Arrange them in ascending order and present it as a grouped data, by taking class-intervals $0-10,10-20,20-30,30-40,40-50$
Answer
$1,2,5,6,8,9,10,12,12,12,13,17,17,17,19,19,19,21,21,23,25,27,30,33, 37,39,40,41,46,48$| Marks | No. of students |
| 0-10 | 6 |
| 10-20 | 11 |
| 20-30 | 5 |
| 30-40 | 4 |
| 40-50 | 4 |
View full question & answer→Question 64 Marks
Complete the table given below :
| Class-interval | Class-limits | Class-size | Class-mark | Class boundaries |
| Lower | Upper | Lower | Upper |
| 26 - 30 | | | | | | |
| 31 - 35 | | | | | | |
| 36 - 40 | | | | | | |
| 41 - 45 | | | | | | |
Answer| Class-interval | Class-limits | Class-size | Class-mark | Class boundaries |
| Lower | Upper | Lower | Upper |
| 26 - 30 | 26 | 30 | 5 | 28 | 25.5 | 30.5 |
| 31 - 35 | 31 | 35 | 5 | 33 | 30.5 | 35.5 |
| 36 - 40 | 36 | 40 | 5 | 38 | 35.5 | 40.5 |
| 41 - 45 | 41 | 45 | 5 | 43 | 40.5 | 45.5 |
View full question & answer→Question 74 Marks
Complete the table given below :
| Class-interval | Class-limits | Class-size | Class-mark | Class boundaries |
| Lower | Upper | Lower | Upper |
| 25 - 30 | | | | | | |
| 30 - 35 | | | | | | |
| 35 - 40 | | | | | | |
| 40 - 45 | | | | | | |
Answer| Class-interval | Class-limits | Class-size | Class-mark | Class boundaries |
| Lower | Upper | Lower | Upper |
| 25 - 30 | 25 | 30 | 5 | 27.5 | 25 | 30 |
| 30 - 35 | 30 | 35 | 5 | 32.5 | 30 | 35 |
| 35 - 40 | 35 | 40 | 5 | 37.5 | 35 | 40 |
| 40 - 45 | 40 | 45 | 5 | 42.5 | 40 | 45 |
View full question & answer→