What is a Data Scientist?

As one of the most innovative, in-demand roles on the market, data scientists are responsible for harnessing the power of data to make valuable predictions and decisions.

This blog post takes an in-depth look at what a data scientist does, from mining structured and unstructured data and extracting useful information to using advanced algorithms and technologies like machine learning and artificial intelligence (AI) for decision-making.

What is a data scientist?

A data scientist is a professional who analyzes and interprets complex datasets. They use advanced analytics tools, algorithms, and machine learning techniques to make predictions and decisions from vast amounts of data.

Data scientists may also use data analytics, data visualization, database management and data engineering skills to help organizations make informed business decisions.

Examples of data scientist work

Some specific examples of how data science is used include:

• Automating customer service operations by using natural language processing (NLP) technologies to respond to inquiries quickly and accurately
• Developing predictive models for predicting stock prices or sales forecasts
• Predicting customer behavior by analyzing past purchase patterns and creating personalized recommendations
• Analyzing large datasets to identify trends in customer behavior, spending habits, and other data points
• Developing AI-driven systems for automating business processes such as recruitment or fraud detection

Responsibilities of data scientists

Now that we can envision what a data scientist does, let’s look at the overall responsibilities.

Collecting, cleaning, and analyzing data

Data scientists collect, clean and analyze large amounts of data from various sources. They will investigate patterns and relationships between variables to identify trends or correlations. This may include tasks such as:

• Cleaning data on a spreadsheet
• Organizing data into data frames in Python
• Applying statistical packages in R to analyze data

Developing predictive models

Once the data has been collected and organized, the data scientist develops predictive models that can be used to forecast trends or results. These models leverage machine learning algorithms to find deeper insights into datasets.

Many such models must be constantly improved and updated to remain valuable. Some examples might be:

• Building a simple clustering model on Tableau
• Running machine learning algorithms on Apache Spark

Enhancing existing analytics platforms

Data scientists help to enhance existing analytics platforms by adding new features and capabilities such as:

• Natural language processing (NLP)
• Advanced search features
• AI-based recommendation systems

These existing platforms may only provide basic descriptive analytics information — without any prescriptive analytics information. By building advanced data science products and features into the existing platforms, data scientists can create additional value and help organizations make better decisions.

Creating data visualizations

Data scientists create visual representations of their data analysis results. These visualizations help the end user understand and interpret the findings — examples of such visualizations may include:

• Sharing charts using a Streamlit dashboard data app.
• Building Tableau dashboards to represent data.
• Plotting quick and simple graphs on Jupyter Notebooks to share among the data team.

Developing algorithms

Data scientists also utilize programming languages such as Python or R to develop algorithms that can be used to automate certain processes. Repetitive tasks such as data cleaning, feature engineering, or model selection can be automated, helping reduce manual effort and increasing efficiency within an organization.

Translating technical concepts into non-technical language

The data scientist ensures that technical concepts and findings are communicated understandably to non-technical users. They must be able to explain complex analysis results in a way that the end user can easily understand.

Data scientist salary

With all that responsibility, you might be handsomely rewarded. The average salary of a data scientist in the US is an attractive one, sitting at $98,789 per year.

However, this may vary depending on the level of education, seniority, work experience, and industry the data scientist is employed in. Due to the low supply of trained data scientists, and the growing demands across industries, most are paid well for their expertise.

Data scientist skills and qualifications

Data scientists tend to have higher education levels, with almost 80% of data scientists having a degree and 38% with a Ph.D. To be successful in their field, data scientists need a set of core skills and knowledge that include:

• Statistical and mathematical proficiency: Data scientists must know probability, statistics, mathematics, computer science, and algorithms.
• Programming abilities: Data scientists must have expertise in coding languages such as Python or R.
• Machine learning and AI: They must have a solid understanding of machine learning principles and how AI can be used to interpret data
• Database knowledge: Knowing how to store, query, and manipulate data is essential for any data scientist
• Business acumen: Understanding the business context and applying analytical insights to solve problems is an important skill for data scientists
• Communication skills: Presenting findings clearly in spoken or written form is necessary for a successful career in data science

Common data scientist tools

Common tools used by data scientists include:

• Python and R: programming and statistical analysis
• SQL databases: querying and managing data
• Tableau or Matplotlib: creating data visualizations to communicate findings
• scikit-learn or TensorFlow: developing machine learning and AI models
• Apache Spark: processing large datasets in a distributed computing environment

Related questions

Are data scientists in demand?

Data scientists are in high demand due to their ability to make sense of large amounts of data (2.5 quintillion bytes of data are created daily). Companies rely on data scientists to identify patterns, uncover trends, and develop actionable solutions that help them out-compete their competitors in their respective industries.

Who does a data scientist work with?

Data scientists typically work with business analysts, product analysts, software engineers, IT professionals, and product managers. They also collaborate with other data-driven professionals, including data analysts, data engineers, mathematicians, statisticians, and computer scientists, to develop sophisticated algorithms to uncover deeper data insights.

What qualifications does a data scientist need?

To be a successful data scientist, you will need at least a bachelor’s degree in a related field, such as computer science, mathematics, or statistics. However, many employers prefer to hire candidates with an advanced degree in data science or similar disciplines.

Employers value relevant work experience, so gaining prior experience before applying for data science roles is always a good idea.

(Check out the most in-demand data certifications.)

Is it difficult to become a data scientist?

Becoming a data scientist is not easy; it requires dedication, determination, and hard work. You must have a solid understanding of mathematics, statistics, computer science, programming languages like Python and R, machine learning algorithms, and other related topics. Additionally, you’ll need to be familiar with tools such as Apache Spark and Hadoop to efficiently process large volumes of data.

Do I need Ph.D. to be a data scientist?

No, you don’t need a Ph.D. to be a data scientist; however, having an advanced degree in data science or related fields will give you an edge over other candidates. Additionally, employers often look for relevant work experience and certifications from recognized institutions to assess your proficiency in the field. With the right qualifications and skill set, becoming a successful data scientist without a Ph.D. is possible.

Is data science a stressful job?

Being a data scientist can be demanding, requiring strong technical skills and creative problem-solving abilities. However, the job is exciting and highly rewarding; you get to work with cutting-edge technologies like AI and machine learning, while helping solve complex problems using large amounts of data.

FAQs about Data Scientists