Question 1: Arrange the following data in ascending order:

(i)

(ii)

Answer:

(i)

(ii)

Question 2: Arrange the following data in descending order:

(i)

(ii)

Answer:

(i)

(ii)

Question 3: Construct a frequency table for each of the following data:

(i)

(ii)

(iii)

(iv)

Answer:

(i) First step is to arrange the data in ascending order.

Tally | ||

(ii) First step is to arrange the data in ascending order.

Tally | ||

(iii) First step is to arrange the data in ascending order.

Class Interval | Tally | |

(iv) First step is to arrange the data in ascending order.

Tally | ||

Question 4: Fill in the blanks:

(i) Lower limit of the class interval is .

(ii) Upper limit of the class interval is .

(iii) Class size of the interval is .

(iv) If the upper and the lower limits of a class interval be and respectively, then the class interval is

(v) If the lower and the upper limit of the class interval be and respectively, then the class interval is .

Question 5: The marks out of , obtained by students of a class in an examination are given below:

Arrange them in ascending order and present it in a grouped data, by taking class interval as

Answer:

In ascending order:

(number of students) | |

Question 6: The fine imposed in Rs. on students for being absent is given below:

Present the data in the form of frequency distribution table by taking class interval of .

Answer:

Fine (Rs.) | Tally | (no of students) |

Question 7: The weight in kg of 30 students are given below:

For the group frequency table by taking class intervals .

Answer:

Weight (kgs) | Tally | (no of students) |

Question 8: The daily income in Rs of workers is given below:

Construct a frequency table using groups .

Answer:

Class Interval | Tally | |

Question 9: The heights of 45 students measured to the nearest centimeter are given below:

Prepare a frequency table taking class intervals

Answer:

Class Interval | Tally | |

Question 10: Complete the table

Class Interval | Class Limit | Class Size | Class Mark | Class Boundaries | ||

Lower | Upper | Lower | Upper | |||

25-30 | ||||||

30-35 | ||||||

35-40 | ||||||

40-45 |

Answer:

Class Interval | Class Limit | Class Size | Class Mark | Class Boundaries | ||

Lower | Upper | Lower | Upper | |||

25-30 | ||||||

30-35 | ||||||

35-40 | ||||||

40-45 |

Question 11: Complete the table

Class Interval | Class Limit | Class Size | Class Mark | Class Boundaries | ||

Lower | Upper | Lower | Upper | |||

26-30 | ||||||

31-35 | ||||||

36-40 | ||||||

41-45 |

Answer:

Class Interval | Class Limit | Class Size | Class Mark | Class Boundaries | ||

Lower | Upper | Lower | Upper | |||

26-30 | ||||||

31-35 | ||||||

36-40 | ||||||

41-45 |