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Assessment Resources
Objective Type Questions
Recap 4. What is the formula for discrete uniform distribution?
5. What does PMF stand for?
• The practice of combining two or more similar records into a single one is known as data merging. This section contains questions B. Long answer type questions:
• In Data Science, data merging is the procedure of combining two or more datasets into a single data frame. 1. What is considered as Normal distribution of data in statistics and why it is so important?
• We can do data merging by applying data joins on the databases in frame.
• A z-score defines the position of a point in terms of its distance from the mean when it is calculated in standard with specific answers. 2. What is the purpose of learning Statistical Problem Solving Process?
deviation units. 3. Explain in detail how we formulate statistical investigative questions. [CBSE Handbook]
• The z-score is important because it tells you not only about the value but also where it falls in the distribution.
• Percentile is a number that represents the percentage of scores that fall at or below that number. Critical Thinking
• Decile is a technique that is used to divide a distribution into ten equivalent parts. Higher Order Thinking Skills (HOTS)
1. Consider that there are 60 students in your class out if which 20 get affected with cold and flu every semester. Note
down five statistical investigative questions for determining a student’s immunity to a catching cold and flu.
Solved Exercise [CBSE Handbook]
2. Consider you are taking a part in an animal welfare campaign. One of the most recent concerns raised by people is dogs
Objective Type Questions (Section A) not being able to tolerate sudden rise in temperatures due to global warming. Note down five statistical investigative
questions to understand how dogs react to changing weather.
A. Tick ( ) the correct option. Creativity
1. The pth percentile of a distribution is such that: [CBSE Handbook] Applied Project
Consider that you have a food event in your residential society. Perform detailed analysis and interpret what should be the top
a. p percent of the observations fall at it b. p percent of the observations fall below it five cuisines that most people in the society prefer for this event.
c. p percent of the observations fall at or below it d. the value is p
2. There are ____________________ types of data joins.
a. 2 b. 3
c. 4 d. 5 Higher Order Thinking Skills
3. Which of the following is also called N:N relationship?
a. One to one Join b. One to many Join
c. Many to many Join d. All of these
4. According to percentiles, the median to be measured must lie in ____________________ . [CBSE Handbook] This section contains the
a. 80th b. 40th
c. 50th d. 100th questions that are out of the box
5. A ____________________ z-score tells that the raw score is below the mean average.
a. positive b. negative and helps the learner to think
c. zero d. None of these
6. What measures of position divide the distribution into 10 equal parts? [CBSE Handbook]
a. Quartiles b. Deciles differently.
c. Percentiles d. Range
Answers
Exercise (Section A)
A. 1. c. 2. a. 3. d. 4. c. 5. a. 6. a. 7. c. 8. d. 9. d. 10. a. 11. c. 12. d. 13. d. 14. d.
B. 1. Probability distribution 2. Probability 3. Discrete Data 4. Continuous Data 5. Bernoulli 6. Binomial
7. Poisson 8. Probability Mass Functions (PMF)
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Distributions in Data Science 159
4. What are data governance strategic objectives?
5. What are the guidelines for managing data confidentiality?
Life Skills & Values
Higher Order Thinking Skills (HOTS)
1. Please answer the questions given below in no less than 200 words. [CBSE Handbook]
a. What, according to you, should be the technique used to discard the confidential data collected from users while
making an online transaction? Applied Project
b. How can you make sure that the data that you collected from users while conducting a poll is stored securely?
2. Wherever you go, you must have seen someone ask you to fill out your basic details to provide you with an exciting
offer. Do they really provide you with some offer?
Applied Project Experiential Learning This section contains an activity
1. Suppose you were working with an NGO to help in vaccinating all the kids in your area against Polio. Now that
vaccination drive is completed and all the kids are vaccinated, you wanted to make sure that you discard the data about that applies the concepts of the
kids that you collected during vaccination. Explain the technique that you would use to discard this data and how will
you implement this action. [CBSE Handbook]
2. Nowadays we all use many different kinds of applications for our convenience. To use those applications, we need
to register ourselves by providing confidential information. Even if you don’t want to register, it will ask you to login chapter in real-life.
through your Gmail account, which ultimately shares your data. Can you brief the reason about this kind of process?
Standard Questions
Projects
This section contains This section has an
theory-based questions.
assessment to develop
Answers practical proficiency.
Exercise (Section A)
A. 1. a 2. c 3. c 4. d 5. d 6. d 7. d 8. b
B. 1. True 2. True 3. False 4. False 5. False
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14. A six-sided die is tossed three times. The probability of observing three ones in a row is _________________.
a. 1 3 b. 6 1
c. 27 1 d. 126 1 PROJECTS
B. Fill in the blanks. Experiential Learning
1. ____________________ is a mathematical approach that displays the likely values for a variable and how frequently they Life Skills & Values
occur. 1. Write down the ages of any 10 students of your class in the table given below: Inter-Disciplinary
2. ____________________ is one of the main building blocks of data science and machine learning. S.No Age
3. ____________________ refers to the data that accepts only particular values. 1
4. ____________________ refers to the data that can accept any value within a range. 2 3
5. ____________________ distribution is one of the simplest discrete probability distributions. 4
6. ____________________ distribution is a common probability distribution that models the probability of obtaining one of 5
two outcomes under a given number of parameters. 6
7
7. ____________________ distribution is a probability distribution that is used to display the frequency of an event over a 8
given time period. CBSE Sample Question Paper 9
8. Continuous distributions are defined by the Probability Density Functions (PDF) instead of ____________________. 10
DATA SCIENCE (SUBJECT CODE–419) Calculate the mean, median, and mode from the above data in the space given below:
Standard Questions (Section B)
CLASS X (SESSION 2022–2023)
A. Short answer type questions:
1. What is distribution? Max. Time: 2 Hours Max. Marks: 50
Ans. A distribution is a simple way to visualize a set of data. It can be shown either as a graph or in a list, revealing which
values of a random variable have lower or higher chances of happening. General Instructions:
2. How does distribution assist us? 1. Please read the instructions carefully.
2. This Question Paper consists of 21 questions in two sections: Section A & Section B.
Ans. Distribution assists us in truly visualising what is going underneath, while the concept of probability provides the 3. Section A has Objective type questions whereas Section B contains Subjective type questions.
mathematical computations. 4. Out of the given (5 + 16 =) 21 questions, a candidate has to answer (5 + 10 =) 15 questions in the allotted
3. Write the names of two types of data. (maximum) time of 2 hours.
Ans. Discrete and Continuous 5. All questions of a particular section must be attempted in the correct order.
4. What is discrete probability distribution? How is it expressed? 6. SECTION A – OBJECTIVE TYPE QUESTIONS (24 MARKS):
Ans. A discrete probability distribution is a distribution where observation can take only a finite number of values. It is i. This section has 05 questions.
ii. Marks allotted are mentioned against each question/part.
expressed with a formula (Density Function) describing the shape of the distribution. iii. There is no negative marking.
5. Mention the names of any two discrete probability distribution. iv. Do as per the instructions given.
Ans. Bernoulli distribution and Binomial distribution 7. SECTION B – SUBJECTIVE TYPE QUESTIONS (26 MARKS):
6. What is the formula to PMF of Bernoulli distribution? i. This section has 16 questions.
ii. A candidate has to do 10 questions.
Ans. The probability mass function or PMF of Bernoulli Distribution is given as iii. Do as per the instructions given.
P(n) = p n ×(1–p) 1–n iv. Marks allotted are mentioned against each question/part.
7. What is the use of Poisson distribution? Projects 211
Ans. Poisson distribution is used to model count-based data like how many emails you receive in your mailbox in an hour or SECTION A: OBJECTIVE TYPE QUESTIONS
how many people enter a store in a day. Q. 1. Answer any 4 out of the given 6 questions on Employability Skills (1 × 4 = 4 marks)
8. What do you mean by discrete uniform distribution? i. What are the ABC of Stress Management?
Ans. According to statistics and probability theory, a statistical distribution where the probability of outcomes is equally
likely and with finite values is called the discrete uniform distribution. a. Avertible, Belief, Consequences.
b. Adversarial, Being, Control,
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c. Adversity, Belief, Consequences
d. Adversity, Belief, Control
ii. Which of the below is not a step of Effective Time Management– CBSE Sample Question Paper
a. Organise b. Prioritise
c. Control d. Remember
iii. ICT stands for It is a model test paper for students
a. International Communication Technology
b. Information Communication Technology
c. Informative Communicative Technology to practise.
d. International Communicative Technology
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