Range of Data

Q.

The marks obtained by $17$ students a mathematics test (out of $100$) are given below:
$90,79,76,82,65,96,100,91,82,100,49,46,64,48,72,66,68$. Find the range of the above data.

Q. The marks scored by 40 students of class IX in mathematics are given below:
81, 55, 68, 79, 85, 43, 29, 68, 54, 73, 47, 35, 72, 64, 95, 44, 50, 77, 64, 35, 79, 52, 45, 54, 70, 83, 62, 64, 72, 92, 84, 76, 63, 43, 54, 38, 73, 68, 52, 54

Prepare a frequency distribution with class size of 10 marks.

Q.

The size of a class interval is obtained by dividing the ________ of the data by the number of class intervals.

1. Mid value

2. Highest Value

3. Range

4. Lowest value

Q.

The class mark of class interval 25-30 is ______

1. 22.5

2. 27.5

3. 25

4. 30

Q.

Explain the meaning of class-mark.

Q.

Find the range from the marks obtained by 10 students in a class.

95, 67 , 28 , 32 , 65 , 65 , 69 , 33 , 98 , 96

1. 50

2. 70

3. 100

4. 30

Q. The heights (in cm) of students of a class is tabulated below.
$$\begin{array}{cc}Height& Numberofstudents\\ 150-154& 4\\ 155-159& 3\\ 160-164& 2\\ 165-169& 1\\ 170-174& 2\\ 175-179& 2\\ 180-184& 4\\ 185-190& 2\\ Total& 20\end{array}$$
Identify the correct option(s).

1. The class distribution is discontinuous
2. Number of students having height in range of 160-174 cm is 5
3. The data can not be changed into continuous class interval form
4. The range of data is 40

Q.

Class mark of a class is _____

1. Upper limit + lower limit

2. upper limit - lower limit

3. $\frac{\text{upper limit + lower limit}}{2}$

4. $\frac{\text{upper limit - lower limit}}{2}$

Q.

Question 3 (iii)
The relative humidity (in %) of a certain city for a month of 30 days was as follows:
$$\begin{array}{cccccccccc}98.1& 98.6& 99.2& 90.3& 86.5& 95.3& 92.9& 96.3& 94.2& 95.1\\ 89.2& 92.3& 97.1& 93.5& 92.7& 95.1& 97.2& 93.3& 95.2& 97.3\\ 96.2& 92.1& 84.9& 90.2& 95.7& 98.3& 97.3& 96.1& 92.1& 89\end{array}$$
(iii) What is the range of this data?

Q. Question 6
The class marks of a continuous distribution are 1.04, 1.14, 1.24, 1.34, 1.44, 1.54 and 1.64.
Is it correct to say that last interval will be 1.55 - 1.73? Justify your answer.

Q.

Minimum value on subtraction from maximum value gives _________.

Q.

The monthly electricity bill of a family for the year 2018 is; 250 200 300 500 750 1000 1200 795 600 500 300 150.

Find the range.

1. 1100

2. 1050

3. 1000

4. 900

Q.

What is Range?

Q. The class - mark of class interval 10-15 is . [2 Marks]

Q. The daily minimum temperature recorded (in degree F) at a place during a week was as under:

Monday	Tuesday	Wednesday	Thursday	Friday	Saturday
35.5	30.8	27.3	32.1	23.8	29.9

Find the mean temperature.

Q. The marks obtained by 17 students of a class in a test (out of 100) are given below:
90, 79, 76, 82, 46, 64, 72, 49, 68, 66, 48, 91, 82, 100, 96, 65, 84
The range of the data is
(a) 46
(b) 54
(c) 90
(d) 100

Q.

The monthly electricity bill of a family for the year 2013 is; 250 200 300 500 750 1000 1200 795 600 500 300 150. Find the range.

__

Q.

The value of x in the given parallelogram is

1. 22

2. 33

3. 11

4. 44

Q.

Following are the observations made by ram 7, 7, 7, 7, 7, x. If the range of the given observations is 0, then what is the value of x.

1. 2

2. 14

3. 7

4. 1

Q.

Find the range from the marks obtained by 10 students of a class.

95, 67 , 28 , 32 , 65 , 65 , 69 , 33 , 98 , 96

1. 30

2. 20

3. 70

4. 100

Q.

The difference between the highest and the lowest values in the given data is called the 'range' of the data.

1. True

2. False

Q.

Class mark of a particular class is 9.5 and the class size is 6, then the class interval is

1. 3.5 - 15.5
2. 6.5 - 12.5
3. 15.5 - 27.5
4. 12.5 - 18.5

Q.

Find the range of the following data: 26, 21, 33, 17, 14, 15, 27.

1. 17

2. 19

3. 13

4. 15

Q.

The relative humidity (in %) of a certain city for a month of 30 days was as follows:

98.1 98.6 99.2 90.3 86.5 95.3 92.9 96.3 94.2 95.1

89.2 92.3 97.1 93.5 92.7 95.1 97.2 93.3 95.2 97.3

96.2 92.1 84.9 90.2 95.7 98.3 97.3 96.1 92.1 89

(i) Construct a grouped frequency distribution table with classes

84 - 86, 86 - 88

(ii) Which month or season do you think this data is about?

(iii) What is the range of this data?

Q.

For the data $4,3,-4,-3,0,1,2,3$ and $3$

The highest observation$=$_____.

Q.

For the data $0,1,2,-2,-1$and $0$:

The lowest observation_______.