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# Fundamentals of Statistics for Data Science

## Introduction to Statistics

Statistics is among the most widely used and important disciplines of study that has proved to be indispensable in numerous domains such as Engineering, Psychology, Operational Research, Chemometrics, etc. Among the most dependent statistical discipline is the field of Data Science and this is the reason that for having an in-depth understanding of it, Statistics should be understood in great detail.

The term statistics is often misunderstood, and this is the reason that first, we need to get a very clear understanding of it. In order to understand basic statistics for data science, we first have to understand get familiarized with a few basic terminologies.

### Population

A population can be understood as the total number of individual humans, other organisms, or any other object that makes up a whole. With this understanding, the underlying conditions are very important in determining the number of objects/items, etc. that will form the population. If we talk about the Apple Laptops manufactured in the month of September 2013 in a particular factory of China, then the number may not be as large as the total number of computers presently active in the world. Thus, the population may or may not be large as this depends on the conditions which define what is to be considered as the population.

### Parameter

Numerous mathematical calculations can be performed on the population such as finding the most common item or value occurring in the population or finding the average etc. All such arithmetic operations that allow us to define the population in simple numeric digits are provided with the term parameter. For example, if we want to know the average age of all the people living in a village. If there are 200 people in that village whose age we are able to capture successfully then this average age will be called a parameter. It will be called so as its value has been calculated using the complete population information.

### Sample

In simplest terms, a sample is nothing but a subset of the population (that ideally represents the population). The samples can be of various types such as

1. Random Sample: Samples generated by randomly picking objects from the population and here random means without any bias or preconceived conditions. Here every object (or whatever the subject is in the population) gets an equal opportunity to be selected as a part of the sample.
2. Stratified Sample: Here the samples are created by considering the underlying groups that could be found in the population. For example, if we are collecting a sample of cars on roads and if we have 40% hatchback and 60% sedans then while creating the sample, we will follow the same stratification.
3. **Convenience Sampling: **Among the most widely used method of creating a sample, under this methodology, samples are not created by chasing after the subjects. A typical example of this would be online surveys or samples created through feedback forms etc. where the subjects at their own will provide the information.
4. Clustered Sample: This form of a sample creation is most commonly conducted in collecting data for Exit polls, TRP calculation, advertisement placement, etc. Here the geographical area is divided where from each geographical entity a stratified or random sample is created.

One must keep in mind that no method is intrinsically better or worse than the other and are just different ways of creating a sample that suits different requirements.

The next logical question could be to question the very need of creating a sample in the first place. Why do we need to create a sample when we have the population and this has few obvious answers.

• Firstly, there can be a situation where capturing the population information is nearly impossible. For example, to know the age of each individual human being on earth. Finding the average of 7 billion numbers may not be an impossible technological task but to obtain such information is extremely tough. Here the population is highly dispersed which makes it difficult for us to obtain the complete data.
• The other reason can be when we have the population information i.e. a bank having a large number of branches throughout the world with each having hundreds of accounts which in turn makes numerous transactions. While such data may be available in the bank’s server, doing any operation on such a population data can be challenging because of its sheer velocity and volume.

#uncategorized #data science

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## How To Build A Data Science Career In 2021

For this week’s data science career interview, we got in touch with Dr Suman Sanyal, Associate Professor of Computer Science and Engineering at NIIT University. In this interview, Dr Sanyal shares his insights on how universities can contribute to this highly promising sector and what aspirants can do to build a successful data science career.

With industry-linkage, technology and research-driven seamless education, NIIT University has been recognised for addressing the growing demand for data science experts worldwide with its industry-ready courses. The university has recently introduced B.Tech in Data Science course, which aims to deploy data sets models to solve real-world problems. The programme provides industry-academic synergy for the students to establish careers in data science, artificial intelligence and machine learning.

“Students with skills that are aligned to new-age technology will be of huge value. The industry today wants young, ambitious students who have the know-how on how to get things done,” Sanyal said.

#careers # #data science aspirant #data science career #data science career intervie #data science education #data science education marke #data science jobs #niit university data science

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If you accumulate data on which you base your decision-making as an organization, you should probably think about your data architecture and possible best practices.

If you accumulate data on which you base your decision-making as an organization, you most probably need to think about your data architecture and consider possible best practices. Gaining a competitive edge, remaining customer-centric to the greatest extent possible, and streamlining processes to get on-the-button outcomes can all be traced back to an organization’s capacity to build a future-ready data architecture.

In what follows, we offer a short overview of the overarching capabilities of data architecture. These include user-centricity, elasticity, robustness, and the capacity to ensure the seamless flow of data at all times. Added to these are automation enablement, plus security and data governance considerations. These points from our checklist for what we perceive to be an anticipatory analytics ecosystem.

#big data #data science #big data analytics #data analysis #data architecture #data transformation #data platform #data strategy #cloud data platform #data acquisition

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## 'Commoditization Is The Biggest Problem In Data Science Education'

The buzz around data science has sent many youngsters and professionals on an upskill/reskilling spree. Prof. Raghunathan Rengasamy, the acting head of Robert Bosch Centre for Data Science and AI, IIT Madras, believes data science knowledge will soon become a necessity.

IIT Madras has been one of India’s prestigious universities offering numerous courses in data science, machine learning, and artificial intelligence in partnership with many edtech startups. For this week’s data science career interview, Analytics India Magazine spoke to Prof. Rengasamy to understand his views on the data science education market.

With more than 15 years of experience, Prof. Rengasamy is currently heading RBCDSAI-IIT Madras and teaching at the department of chemical engineering. He has co-authored a series of review articles on condition monitoring and fault detection and diagnosis. He has also been the recipient of the Young Engineer Award for the year 2000 by the Indian National Academy of Engineering (INAE) for outstanding engineers under the age of 32.

Of late, Rengaswamy has been working on engineering applications of artificial intelligence and computational microfluidics. His research work has also led to the formation of a startup, SysEng LLC, in the US, funded through an NSF STTR grant.

#people #data science aspirants #data science course director interview #data science courses #data science education #data science education market #data science interview

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Data Science becomes an important part of today industry. It use for transforming business data into assets that help organizations improve revenue, seize business opportunities, improve customer experience, reduce costs, and more. Data science became the trending course to learn in the industries these days.

Its popularity has grown over the years, and companies have started implementing data science techniques to grow their business and increase customer satisfaction. In online Data science course you learn how Data Science deals with vast volumes of data using modern tools and techniques to find unseen patterns, derive meaningful information, and make business decisions.

Advantages of Data Science:- In today’s world, data is being generated at an alarming rate in all time lots of data is generated; from the users of social networking site, or from the calls that one makes, or the data which is being generated from different business. Because of that reason the huge amount of data the value of the field of Data Science has many advantages.

Some Of The Advantages Are Mentioned Below:-

Multiple Job Options :- Because of its high demand it provides large number of career opportunities in its various fields like Data Scientist, Data Analyst, Research Analyst, Business Analyst, Analytics Manager, Big Data Engineer, etc.

Business benefits: - By Data Science Online Course you learn how data science helps organizations knowing how and when their products sell well and that’s why the products are delivered always to the right place and right time. Faster and better decisions are taken by the organization to improve efficiency and earn higher profits.

Highly Paid jobs and career opportunities: - As Data Scientist continues working in that profile and the salaries of different position are grand. According to a Dice Salary Survey, the annual average salary of a Data Scientist \$106,000 per year as we consider data.

Hiring Benefits:- If you have skills then don’t worry this comparatively easier to sort data and look for best of candidates for an organization. Big Data and data mining have made processing and selection of CVs, aptitude tests and games easier for the recruitment group.

Also Read: How Data Science Programs Become The Reason Of Your Success

Disadvantages of Data Science: - If there are pros then cons also so here we discuss both pros and cons which make you easy to choose Data Science Course without any doubts. Let’s check some of the disadvantages of Data Science:-

Data Privacy: - As we know Data is used to increase the productivity and the revenue of industry by making game-changing business decisions. But the information or the insights obtained from the data may be misused against any organization.

Cost:- The tools used for data science and analytics can cost tons to a corporation as a number of the tools are complex and need the people to undergo a knowledge Science training to use them. Also, it’s very difficult to pick the right tools consistent with the circumstances because their selection is predicated on the proper knowledge of the tools also as their accuracy in analyzing the info and extracting information.

#data science training in noida #data science training in delhi #data science online training #data science online course #data science course #data science training

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## 50 Data Science Jobs That Opened Just Last Week

Our latest survey report suggests that as the overall Data Science and Analytics market evolves to adapt to the constantly changing economic and business environments, data scientists and AI practitioners should be aware of the skills and tools that the broader community is working on. A good grip in these skills will further help data science enthusiasts to get the best jobs that various industries in their data science functions are offering.

In this article, we list down 50 latest job openings in data science that opened just last week.

(The jobs are sorted according to the years of experience r

#### 1| Data Scientist at IBM

**Location: **Bangalore

Skills Required: Real-time anomaly detection solutions, NLP, text analytics, log analysis, cloud migration, AI planning, etc.

Apply here.

#### 2| Associate Data Scientist at PayPal

**Location: **Chennai

Skills Required: Data mining experience in Python, R, H2O and/or SAS, cross-functional, highly complex data science projects, SQL or SQL-like tools, among others.

Apply here.

#### 3| Data Scientist at Citrix

Location: Bangalore

Skills Required: Data modelling, database architecture, database design, database programming such as SQL, Python, etc., forecasting algorithms, cloud platforms, designing and developing ETL and ELT processes, etc.

Apply here.

#### 4| Data Scientist at PayPal

**Location: **Bangalore

Skills Required: SQL and querying relational databases, statistical programming language (SAS, R, Python), data visualisation tool (Tableau, Qlikview), project management, etc.

Apply here.

#### 5| Data Science at Accenture

**Location: **Bibinagar, Telangana

Skills Required: Data science frameworks Jupyter notebook, AWS Sagemaker, querying databases and using statistical computer languages: R, Python, SLQ, statistical and data mining techniques, distributed data/computing tools such as Map/Reduce, Flume, Drill, Hadoop, Hive, Spark, Gurobi, MySQL, among others.

#careers #data science #data science career #data science jobs #data science news #data scientist #data scientists #data scientists india