Tabulation and Interpretation of Ungrouped Data

Q. The class mark for the class interval 70 - 80 is .

1. 85
2. 75
3. 65

Q.

What is the upper limit?

Q.

Explain the meaning of true class-limits.

Q.

There are 30 students in a class. On independence day, different fruits that were distributed among the students (one for each student) are listed below

orange, apple, apple, apple, banana, orange

guava, guava, apple, guava, orange, mango

mango, mango, orange, guava, guava, mango

banana, banana, banana, orange, banana, mango

banana, banana, guava, guava, orange, guava

How many students got the fruit which is least in quantity?

1. 4

2. 5

3. 6

4. 7

Q. Which of the following is the class mark of class interval 25 - 30?

1. 27.5
2. 30
3. 25
4. 26.5

Q. From the given data match the following.{1, 9, 1, 5, 4, 5, 2, 9, 4, 9, 2, 5, 1, 9, 7, 4, 3, 6, 4, 3, 9, 2, 3, 4, 5}

1. 4
2. 3
3. 1
4. 5

Q.

For predicting the weather at a certain place why do you need additional information regarding the geography and the current season in that place?

1. The information is stored so that it is useful for the future.

2. More data is more fun!

3. All of these

4. The geography and the seasons are analyzed to make an accurate weather prediction in that area.

Q. Find the sum of lower limit of fifth and upper limit of sixth class interval for a grouped data whose first and second class intervals are 10 – 15 and 15 – 20.

1. 70
2. 10
3. 65
4. 75

Q. The following are the marks obtained in Maths by students of Class 8:
51, 94, 34, 20, 50, 81, 81, 90, 76, 34, 51, 86, 93, 99, 26, 54, 85, 71, 88, 40, 44, 56, 55, 57, 78, 53, 81, 78, 65, 78.

Group the data and find out how many students scored between 60 and 70.

1. 1

Q. The marks obtained by 25 students in a science test are given below. (Marks out of 30)
$\begin{array}{ccccccccc}8& 7& 12& 17& 20& 11& 10& 10& 16\\ 21& 28& 25& 13& 9& 27& 18& 20& 19\\ 7& 29& 16& 15& 20& 22& 27& & \end{array}$
Using this data, answer the following questions:

(1) What is the lowest score obtained?
(2) How many students have obtained this lowest score?
(3) How many students have obtained 20 marks?
(4) What is the frequency of the score 27?
(5) How many students have scored more than 20 marks?

Q.

The time (in seconds) taken by 150 athletes to run a 110 m hurdle race are tabulated below:

$\begin{array}{ccccccc}\text{Class}& 13.8-14& 14-14.2& 14.2-14.4& 14.4-14.6& 14.6-14.8& 14.8-15\\ \text{Frequency}& 2& 4& 5& 71& 48& 20\end{array}$

The number of athletes who completed the race in less than 14.6 s is ____.

1. 82

Q. Observe the given frequency table and write the answers to the following questions.

Number of family member	1	2	3	4	5	6	7
Frequency (Number of families)	1	3	5	7	7	5	4	N =

(1) What is the number of families about which the table provides data?
(2) How many families have 3 members?
(3) How many families have 5 members?
(4) How many families have the maximum number of members?
(5) How many families have less than 4 members?
(6) How many families have more than 5 members?

Q. 9, 12, 8, 14, 12, 8, 12, 4, 17, 2, 13, 2
The frequency of 12 in the above data is

1. 2
2. 3
3. 4

Q.

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

The frequency of 8 in the data set 8, 2, 8, 3, 8, 4, 5, 8 is ______.

1. 4

2. 2

3. 3

4. 1

Q.

What pieces of information given below would be useful in determining a football player's performance in a match?
i) Height
ii) Weight
iii) Name
iv) Stamina
v) Nationality

1. only (i)

2. (i), (ii)

3. (i), (ii), (iv)

4. (iii), (iv), (v)

Q. Given below is the data scored by the students in a class of 25 in a test out of 10:

1, 2, 3, 1, 4, 5, 6, 3, 4, 7, 3, 8, 8, 9, 10, 2, 3, 4, 5, 7, 6, 8, 2, 3, 7.

How many students scored 7 marks out of 10 in the test?

1. 
   2
2. 
   5
3. 
   3
4. 
   4

Q. The bar graph shows the usual method of transport to school for the students in a class. How many students are there altogether in the class?

Q. The record of daily rainfall (in centimetres) in Walwa village in the first 15 days of September is given below:
2.5 , 1.5, 4.0, 3.0, 0.5, 5.0, 5.5, 4.0, 2.5, 3.5, 6.0, 0.5, 0.5, 4.5, 1.5.
Find the mean rainfall for these 15 days.

Q.

The time (in seconds) taken by 150 athelets to run a 110 m hurdle race are tabulated below

$\begin{array}{ccccccc}Class& 13.8-14& 14-14.2& 14.2-14.4& 14.4-14.6& 14.6-14.8& 14.8-15\\ Frequency& 2& 4& 5& 71& 48& 20\end{array}$

Choose the correct option(s):

1. 11

2. 71

3. 82

4. 130

Q.

The class mark of class interval 25-30 is ______

1. 22.5

2. 27.5

3. 30

4. 25

Q.

The tally chart shows the amount of rainfall in different cities. Select the right options.

1. Range
2. Frequency
3. Data
4. Tally marks

Q.

If we draw a histogram for the following frequency distribution, what will be the height of the bar for the class interval 15 - 30?

1. 3
2. 7
3. 11
4. 4

Q. Data collected randomly from sources is called _____.

1. hypothetical data
2. qualitative data
3. raw data
4. organised data

Q.

In a Ranji match, 20 teams scored the following scores. Arrange the given data in grouped frequency distribution.

Scores: 11, 15, 23, 25, 31, 33, 39, 42, 43, 49, 51, 56, 65, 75, 79, 89, 99, 98, 92, 91 [2 MARKS]

Q. The following are the marks obtained in Maths by students of Class 8:
51, 94, 34, 20, 50, 81, 81, 90, 76, 34, 51, 86, 93, 99, 26, 54, 85, 71, 88, 40, 44, 56, 55, 57, 78, 53, 81, 78, 65, 78.

Group the data and find out how many students scored between 60 and 70.

Q.

Tally marks are used to find :

1. Class intervals

2. Range

3. Frequency

4. Upper limit