CBSE Class 10 Question Paper 2023 Dat Science

Qu e st i o n

P a p e r
2023

Series ZWYX Set-4
Q.P. Code 106
Roll No.

DATA SCIENCE
Time allowed : 2 hours Maximum Marks : 50

Please check that this question paper contains 11 printed pages.
Q.P. Code given on the right hand side of the question paper should be
written on the title page of the answer-book by the candidate.
Please check that this question paper contains 21 questions.
Please write down the serial number of the question in the
answer-book before attempting it.
15 minute time has been allotted to read this question paper. The
question paper will be distributed at 10.15 a.m. From 10.15 a.m. to
10.30 a.m., the students will read the question paper only and will not
write any answer on the answer-book during this period.
*
General Instructions :
(i) Please read the instructions carefully.
(ii) This question paper consists of 21 questions in two sections : Section A
and Section B.
(iii) Section A has Objective Type Questions, whereas Section B contains
Subjective Type Questions.
(iv) Out of the given (5 + 16 =) 21 questions, the candidate has to answer
(5 + 10 =) 15 questions in the allotted (maximum) time of 2 hours.
(v) All questions of a particular section must be attempted in the correct
order.

106 Page 1 of 11 P.T.O.

(vi) Section A : Objective Type Questions (24 marks) :
(a) This section has 5 questions.
(b) There is no negative marking.
(c) Do as per the instructions given.
(d) Marks allotted are mentioned against each question/part.
(vii) Section B : Subjective Type Questions (26 marks) :
(a) This section has 16 questions.
(b) A candidate has to do 10 questions.
(c) Do as per the instructions given.
(d) Marks allotted are mentioned against each question/part.

SECTION A
(Objective Type Questions) (24 marks)

1. Answer any 4 out of the given 6 questions on Employability Skills. 4 1=4

(i) Stress management can help you to

(a) have a joyful life.

(b) have a stressful life.

(c) be less energetic.

(d) have no time for friends and family.

(ii) Which type of motivation makes us do things because they make us
happy ?

(a) Internal motivation

(b) External motivation

(c) Both (a) and (b)

(d) Neither (a) nor (b)

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(iii) Which of the following is a mobile operating system ?
(a) Ubuntu (b) Microsoft Windows
(c) Google Android (d) macOS

(iv) Installing the __________ helps in increasing the performance of the
computer.
(a) spam files
(b) disk cleaner software
(c) temporary files
(d) extra files

(v) Making decisions is an important _________ of an entrepreneur.
(a) misconception (b) hindrance
(c) function (d) myth

(vi) A/An _________ is a line of work that a person takes for life.
(a) impression (b) commission
(c) quality (d) career

2. Answer any 5 out of the given 6 questions. 5 1=5

(i) State whether the following statement is true or false :

Subsetting helps to focus first on the required set of data.

(ii) Which of the following statement is true about median ?

(a) It is the smallest element of a sorted data set.

(b) It is the middle point of a sorted data set.

(c) It is the middle point of an unsorted data set.

(d) It is the smallest element of an unsorted data set.

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(iii) Standard Deviation represents how much the data is spread out
around the _________ or an average.

(a) Standard deviation

(b) Mean deviation

(c) Mean

(d) Median

(iv) Two-way relative frequency tables represent the percentage of
_________ that fit in each category.

(a) preference (b) data points

(c) mean values (d) frequency

(v) __________ is an example of discrete data.

(a) Pass or Fail in a Math Test

(b) Length of a road

(c) Weather forecast

(d) Number of stars

(vi) Which of the following is not true for discarding the data ?
(a) This helps us to prevent unauthorized access to the data.
(b) It is important for all of us to make sure that we discard the
digital data in a proper way.
(c) In most of the devices, if you do a soft delete of a particular file,
this file deletes from the original space and cannot be restored.
(d) With the increased amount and intensity of cyber attacks, it is
important for all of us to make sure that we discard the digital
data in a proper way.

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3. Answer any 5 out of the given 6 questions. 5 1=5

(i) Data Merging is the process of combining two or more data sets into
a single _________ .

(a) Data Frame

(b) Data Designing

(c) Data Graphing

(d) Data Handling

(ii) __________ bias is an outcome of seeing what you want to see in the
data.

(a) Linearity

(b) Selection

(c) Survivor

(d) Confirmation

(iii) __________ is all about counting randomness.

(a) Mean

(b) Median

(c) Probability

(d) Graphs

(iv) ______ is an example of real-life implementation of standard deviation.
(a) Grading tests
(b) Sum of values
(c) Sorting of data
(d) Spellcheck

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(v) The private information that is shared should _________ be handled
with confidentiality.

(a) never

(b) sometimes

(c) always

(d) often

(vi) There are two ways in which you can store the data in the
__________ format or as a physical copy.

(a) analog

(b) printed

(c) hardcopy

(d) digital

4. Answer any 5 out of the given 6 questions. 5 1=5

(i) A percentile can be defined as the percentage of the total ordered
observations at or _______ it.

(a) above

(b) equal

(c) below

(d) not at

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(ii) The value of a z-score always tells us the number of standard
deviations we are away from _________ .

(a) median

(b) mean

(c) standard deviation

(d) percentile

(iii) One-to-one join works by _________ the data tables using the
Primary key.

(a) merging

(b) deleting

(c) inserting

(d) concatenating

(iv) Which of the following is true about distribution of an event ?

(a) It shows no values.

(b) It consists of only input values that can be seen.

(c) It consists of all possible values but not input values.

(d) It consists of both input values that can be seen and also all
possible values.

106 Page 7 of 11 P.T.O.

(v) Which of the following is the last step of the Statistical Problem
Solving Process ?

(a) Analyse the data

(b) Formulate statistical investigative questions

(c) Interpret the data

(d) Collect the data

(vi) Which of the following is used to find out the interquartile range ?

(a) Values of quartiles

(b) Values of percentiles

(c) Values of deciles

(d) Values of z-score

5. Answer any 5 out of the given 6 questions. 5 1=5

(i) The weight of students in a class has a mean of 22 with standard
deviation of 4. What is the z-score for a student who weighs 30 kg ?

(a) 0 (b) 1

(c) 2 (d) 3

(ii) The median of the given dataset values 7, 12, 15, 16, 20 is

(a) 15 (b) 10

(c) 11 (d) 12

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(iii) The mean absolute deviation for the data 3, 5, 9, 10, 15, 16 is

(a) 5 (b) 3

(c) 4 (d) 6

(iv) If two coins are tossed at the same time, what is the probability of
getting Head-Tail ?

(a) 0 50

(b) 0 45

(c) 0 25

(d) 0 35

(v) Data collection designs must acknowledge _________ in data.

(a) Statistical Process Control

(b) Test Data

(c) Variability

(d) Experimental Designs

(vi) If the data that is fed into the system is __________, model accuracy
and fidelity are compromised.

(a) biased

(b) predictive

(c) accurate

(d) continuous

106 Page 9 of 11 P.T.O.

SECTION B

(Subjective Type Questions) (26 marks)

Answer any 3 out of the given 5 questions on Employability Skills. Answer each
question in 20 30 words. 3 2=6

6. What is self-motivation ? Give an example.

7. Explain any two steps for Effective Time Management.

8. Define any two of the following :

(a) Virus

(b) Identity Theft

(c) Software Piracy

9. What are the two ways of employment in which one can earn a living ?
Give an example for each.

10. What are the qualities of an entrepreneur ?

Answer any 4 out of the given 6 questions in 20 30 words each. 4 2=8

11. What is Data-based subsetting ? Give an example.

12. What is Continuous data ? Give an example.

13. Why is Central Limit Theorem important ?

14. What is Many-to-Many Join ? Give an example to support your answer.

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15. Name the two ways in which data can be stored. Give an example.

16. Define the term percentile. Give an example.

Answer any 3 out of the given 5 questions in 50 80 words each. 3 4=12

17. Give the steps to calculate Standard Deviation.

18. Explain the following components of the Statistical Problem-Solving
Process with example :

(a) Formulate statistical investigative questions

(b) Collect/Consider the data

19. Differentiate between Recall Bias and Survivor Bias. Give an example of
each.

20. What is the Interquartile Range ? Give an example to calculate an
interquartile range.

21. Mention any two ways to discard the data stored in physical copy and any
two ways to discard digital data.

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