Class Size

Q.

If class mark is $10$ and class width is $6$ then find the class.

Q.

Write the class size and class limits in each of the following:

(i) 104, 114, 124, 134, 144, 154 and 164

(ii) 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97 and 102

(iii) 12.5, 17.5, 22.5, 27.5, 32.5, 37.5, 42.5, 47.5

Q. Which of the following collections are sets?
(i) The collection of rich people in your district.
(ii) The collection of natural number less than 50.
(iii) the collection of most talented persons of India.
(iv) the collection of first ten prime integers.
(v) The collection of all days in a week starting with the letter 'T'
(vi) The collection of some months in a year.
(vii) the collection of all books in your school library.
(viii) the collection of smart boys in your class.
(ix) The collection of multiples of 7.
(x) The collection of students in your class who got a lot of marks in the first unit test.

Q.

For the class 90-99, 90 is called the

1. Upper Class Limit

2. Range

3. Lower Class Limit

4. Class Mark

Q. The classes are given as:
100 - 110, 110 - 120, 120 - 130, 130- 140
Find the class width.

Q.

Write the class size of $100-120,120-140,140-160$

Q. The mid-value of a class interval is 42 and the class size is 10. The lower and upper limits are
(a) 37−47
(b) 37.5−47.5
(c) 36.5−47.5
(d) 36.5−46.5

Q. The classes are given as:
100 - 110, 110 - 120, 120 - 130, 130- 140
Find the class width.

Q. To construct a histogram, Ankita observed the range of observations. She decided to divide that range into a number of parts. Then she does following calculation:
Range/no. of parts.

What are the terms used to describe
a. number of parts
b. range/no. of parts

1. intervals, class width
2. number of bars, width of bars
3. class, band width
4. frequency, class interval

Q. The classes are given as {100 - 110, 110 - 120, 120 - 130, 130- 140}. Find the class width.

1. 100
2. 10
3. 9
4. 110

Q.

The size of the interval in a data table depicting the entities contained in it is known as

1. Class mark

2. Class height

3. Class interval

4. Range

Q. The small groups obtained on grouping all the observations are called ________ and their size is called the _________.

1. Class size, Class Intervals.
2. Class Intervals, Class Size
3. Mid value, Range
4. Range, Mid Value