Data

Q.

Find the median of the following :

$19,21,23,27,25,24,20,18,15,26,29,28,30$

Q.

What is a graph drawn using vertical bars called?

1. A bar graph

2. A line graph

3. A pictograph

4. A pie graph

Q.

Data arranged in an unorganised manner is called raw data.

1. organised data

2. Meaningful data

Q.

The data which have already been collected by someone is called :

1. raw data

2. array data

3. primary data

4. secondary data

Q.

The range of the data: $25,18,20,22,16,6,17,15,12,30,32,10,19,8,11,20$ is

1. $10$

2. $15$

3. $18$

4. $26$

Q. Data, collected through firsthand research is called .

1. primary data
2. secondary data
3. grouped data

Q.

The range of the data $6,8,16,22,8,20,7,25$ is $\_\_\_\_\_$.

Q. A survey was conducted by a group of students as a part of their environment awareness programme, in which they collected the following data regarding the number of a plants in 20 houses in a locality. Find the mean number of plants per house.

Number of plants:	0-2	2-4	4-6	6-8	8-10	10-12	12-14
Number of houses:	1	2	1	5	6	2	3

Which method did you use for finding the mean, and why?

Q.

State true or false.

When the information is collected from a source which already has gathered it, such data is called secondary data.

1. True

2. False

Q.

To study the difference between the Indian variety and the hybrid variety of fruits. Two fruits, i.e., Guava and Papaya were selected. 30 guavas and 30 papayas of each variety were weighed and the numbers were noted down. What step of the statistical study has been completed?

1. Analysis of data

2. Graphical representation of data

3. Drawing conclusions from the data

4. Collection of data

Q.

Can you please tell me how to attend my maths paper? it is going to be held on 28 of March. how can I finish it in on time , before half an hour?

Q.

The group of intelligent students in a class is __________.

1. a null set

2. a finite set

3. a well defined collection

4. not a well defined collection

Q. What is the total number of students in the class?​

1. 36
2. 30
3. 40
4. 50

Q.

If the cumulative frequency for the class interval (50-60) is 92, then find x

$\begin{array}{ccccccc}\text{Class Interval}& 0-10& 10-20& 20-30& 30-40& 40-50& 50-60\\ \text{Frequency}& 12& 20& x& 18& 10& 6\end{array}$

1. 60

2. 32

3. 26

4. 42

Q.

The median of the numbers $4,4,7,5,8,6,8,3,11$ is

1. $8$

2. $6$

3. $11$

4. $3$

Q. ________ of the data is the difference between the maximum and theminimum values of the observations.

1. Median
2. Range
3. Mean
4. Mode

Q.

If the relation R on set A = {1, 2, 3 . . . . . . 13, 14} is defined as R = {(x, y):3x - y = 0}, find the range of R

1. Range = {1, 2, 3, 4}

2. Range = {4, 5, 6, 7}

3. Range = {3, 6, 9, 12}

4. Range = {2, 4, 6, 8}

Q. Find the median and match with its data set.

1. 3
2. 5
3. 4
4. 8

Q.

___ of the data is the difference between the maximum and the minimum values of the observations.

Q.

For accurate prediction of events and presenting statistics, select the most important information required.

1. Event description

2. Previously collected data

3. Previously collected data relevant to the event

4. Prediction based on astrology

Q.

Why the following question is not a statistical question?

"Did Shyam watch television last night?"

1. Statistical questions are answered by collecting data with variability.This question can be answered by simply asking Shyam whether he watched television or not.
2. This is a hard question.
3. This question cannot be answered by simply asking Shyam whether he watched television or not.
4. Statistical questions are answered by collecting data with zero variability.

Q. The following distribution shows the daily pocket allowance of children of a locality. The mean pocket allowance is $Rs.18$. Find the missing frequency $f$.

Daily pocket allowance (in $Rs.$)	$11-13$	$13-15$	$15-17$	$17-19$	$19-21$	$21-23$	$23-25$
Number of children	$7$	$6$	$9$	$13$	$f$	$5$	$4$

Q. Median of the numbers 3, 4, 5, 6, 7 is:

1. 5
2. 7
3. 4
4. 6

Q.

$\begin{array}{cc}\text{Marks}& \text{Cumulative~Frequency}\\ 0& 0\\ 10& 7\\ 20& 28\\ 30& 54\\ 40& 71\\ 50& 84\\ 60& 105\\ 70& 147\\ 80& 180\\ 90& 196\\ 100& 200\end{array}$

Find the frequency for the class interval 70 - 80.

1. 33

2. 42

3. 147

4. 16

Q.

Collecting data on GDP from the government resources will be termed as a ___ data

Q. With respect to average of the data set, choose the correct option.

1. It is the middle value of the data set.
2. It is the sum of observations divided by the total number of observations.
3. It is the most frequently occuring value in the data set.
4. It is the sum of observations.

Q. The question, "How many snacks are available at a vending machine?" falls under which category?

Also choose the category for the question, "Which is the most prefered snack?".

1. Non-Statistical question; Statistical question
2. Statistical question; Non-statistical question

Q.

To get the census of the country, the government collected data from hospitals for the number of births and deaths of people.

What does this data known as?

1. Tertiary

2. None of these

3. Secondary

4. Primary

Q. Pair the observations in 'less than form' to their corresponding cumulative frequency for the given ogive.

1. Less than 10
2. Less than 20
3. Less than 40
4. 5
5. 15
6. 45

Q.

The more data we have regarding something, the less accurate our predictions can be.

1. True

2. False