1.1.1.Defining Data Science - sj50179/IBM-Data-Science-Professional-Certificate GitHub Wiki
Fundamentals of Data Science
Data science can help organizations understand their environments, analyze existing issues, and reveal previously hidden opportunities.
λ°μ΄ν° κ³Όνμ κ° μ‘°μ§μ΄ μ‘°μ§ νκ²½μ μ΄ν΄νκ³ νμ‘΄νλ λ¬Έμ λ₯Ό λΆμνκ³ , μμ μλ μ¨κ²¨μ Έ μμλ κΈ°νλ€μ μ°Ύμλ΄λλ‘ λμμ€λ€.
Data scientists use data analysis to add to the knowledge of the organization by investigating data, exploring the best way to use it to provide value to the business.
λ°μ΄ν° κ³Όνμλ€μ μ‘°μ§μ μ§μμ λ리λ λ° λ°μ΄ν° λΆμμ μ΄μ©νλ€. μ΄λ₯Ό μν΄ λ°μ΄ν°λ₯Ό μ‘°μ¬νκ³ , λ°μ΄ν° λΆμμ μ΄μ©ν μ΅μμ λ°©λ²μ νμνμ¬ μ¬μ μ λμμ μ€λ€.
Good data scientists are curious people who ask questions to clarify the business need.
μ’μ λ°μ΄ν° κ³Όνμλ€μ λΉμ¦λμ€ μꡬλ₯Ό νμ νλ €κ³ μ§λ¬Ένλ νΈκΈ°μ¬ λ§μ μ¬λλ€μ΄λ€.
The next questions are: "what data do we need to solve the problem, and where will that data come from?".
νμν μ§λ¬Έμ "λ¬Έμ ν΄κ²°μ μν΄ νμν λ°μ΄ν°λ 무μμΈκ°?"μ "μ΄λμ λ°μ΄ν°λ₯Ό μμ§ν΄μΌνλκ°?"μ΄λ€.
Data scientists can analyze structured and unstructured data from many sources, and depending on the nature of the problem, they can choose to analyze the data in different ways.
λ°μ΄ν° κ³Όνμλ€μ λ§μ μλ£λ€λ‘λΆν° μμ§ν μ ν λ°μ΄ν°μ λΉμ ν λ°μ΄ν°λ₯Ό λΆμν μ μλ€. λν κ·Έλ€μ λ¬Έμ μ μ νΉμ±μ λ°λΌ λ€λ₯Έ λ°©λ²μ μ΄μ©ν΄μ λ°μ΄ν°λ₯Ό λΆμν μ μκ³ , μ¬λ¬ λͺ¨λΈμ μ΄μ©νμ¬ λ°μ΄ν°λ₯Ό νμνκ³ ν¨ν΄κ³Ό νΉμ΄μΉλ₯Ό μ°ΎμλΈλ€.
Advice for New Data Scientists
My advice to an aspiring data scientist is to be curious, extremely argumentative and judgmental. Curiosity is absolute must. If you're not curious, you would not know what to do with the data. Judgmental because if you do not have preconceived notions about things you wouldn't know where to begin with. Argumentative because if you can argument and if you can plead a case, at least you can start somewhere and then you learn from data and then you modify your assumptions and hypotheses and your data would help you learn. And you may start at the wrong point. You may say that I thought I believed this, but now with data I know this. So, this allows you a learning process. So, curiosity being able to take a position, strong position, and then moving forward with it.
"μ₯μ°¨ λ°μ΄ν° κ³Όνμκ° λλ €λ λΆλ€μκ² λλ¦¬κ³ μΆμ μ‘°μΈμ νΈκΈ°μ¬μ κ°κ³ , λ§€μ° λ Όμμ μ΄λ©°, λΉνμ μ΄μ΄μΌ νλ€λ κ²μ λλ€. νΈκΈ°μ¬μ λ°λμ νμν©λλ€. νΈκΈ°μ¬μ λλΌμ§ μλλ€λ©΄, λ°μ΄ν°λ‘ 무μμ ν΄μΌν μ§ λͺ¨λ₯Ό κ²μ λλ€. μ λΉνμ μ΄μ΄μΌ νλλ©΄, κ·Έ μΌμ΄ μ΄λ¨ κ²μ΄λΌλ μκ°μ νμ§ μμΌλ©΄ μ΄λμλΆν° μμν΄μΌ ν μ§ λͺ¨λ₯΄κΈ° λλ¬Έμ΄μ£ . λ λ Όμμ μ΄μ΄μΌ νλλ°, μ¬λ¬λΆμ΄ λ Όμμ ν μ μκ³ , μ΄λ€ κ²½μ°μ λν΄ λ΅λ³ν μ μλ€λ©΄ μ μ΄λ μ¬λ¬λΆμ μ΄λμλΌλ μμν΄μ λ°μ΄ν°λ‘λΆν° λ°°μΈ μ μκΈ° λλ¬Έμ λλ€. μ¬λ¬λΆμ κ°μ κ³Ό κ°μ€μ μμ ν μ μκ³ , λ°μ΄ν°λ μ¬λ¬λΆμ νμ΅μ λμμ΄ λ κ²λλ€. μλͺ»λ μ§μ μμ μμν μλ μμ΅λλ€. μ¬λ¬λΆμ μλ§λ "λλ μ΄λ΄ κ²μ΄λΌκ³ μκ°νμ΄ νμ§λ§ μ΄μ λ°μ΄ν°λ₯Ό ν΅ν΄μ, μ΄κ±Έ μκ² λμ΄"λΌκ³ λ§νκ² μ£ . κ·Έλμ μ¬λ¬λΆμ μ΄κ±Έ ν΅ν΄ νμ΅ κ³Όμ μ μ μ μμ΅λλ€. λ°λΌμ, νΈκΈ°μ¬μ μ¬λ¬λΆμ΄ νκ³ ν ν¬μ§μ μ μ·¨νκ³ κ±°κΈ°μλΆν° μμΌλ‘ λμκ°λλ‘ ν©λλ€."
So figure out first what you're interested, and what is your competitive advantage. Your competitive advantage is not necessarily going to be your analytical skills. Your competitive advantage is your understanding of some aspect of life where you exceed beyond others in understanding that. Maybe it's film, maybe it's retail, maybe it's health, maybe it's computers. Once you've figured out where your expertise lies, then you start acquiring analytical skills. What platforms to learn and those platforms, those tools would be specific to the industry that you're interested in. And then once you have got some proficiency in the tools, the next thing would be to apply your skills to real problems, and then tell the rest of the world what you can do with it.
"μ°μ μ¬λ¬λΆμ΄ κ΄μ¬ μλ κ²μ΄ 무μμΈμ§, μ¬λ¬λΆμ κ²½μ μ°μλ 무μμΈμ§ μ°Ύμ보μμμ€. κ²½μ μ°μκ° λ°λμ λΆμ κΈ°μ μ΄μ΄μΌ ν νμλ μμ΅λλ€. μ¬λ¬λΆμ κ²½μ μ°μλ μ΄λ€ μμμ μ΄ν΄νλ λ° μμ΄μ λ€λ₯Έ μ¬λλ€μ λ₯κ°νλ κ²μ λλ€. μ΄λ μνμΌ μλ μκ³ , μλ§€μΌ μλ μκ³ , λ³΄κ±΄μΌ μλ μκ³ , μ»΄ν¨ν°μΌ μλ μμ΅λλ€. μΌλ¨ μ¬λ¬λΆμ μ λ¬Έ μ§μμ΄ λ¬΄μμΈμ§ μ°Ύκ³ λμ λΆμ κΈ°μ μ μ΅λνκΈ° μμνλ©΄ λ©λλ€. λ°°μμΌ νλ νλ«νΌλ€κ³Ό λꡬλ€μ μ¬λ¬λΆμ΄ κ΄μ¬ μλ μ°μ μ λ°λΌ λ€λ₯Ό κ²λλ€. κ·Έλ κ² μ¬λ¬λΆμ΄ κ·Έ λꡬλ€μ λ₯μν΄μ§λ©΄, μ¬λ¬λΆμ κΈ°μ μ μ€μ λ¬Έμ μ μ μ©ν΄ 보μμμ€. κ·Έλ¦¬κ³ μ μΈκ³μ μ¬λ¬λΆμ΄ λ°μ΄ν°λ₯Ό μ΄μ©ν΄ 무μμ ν μ μλμ§ λ§νμμμ€."
Lesson Summary
In this lesson, I have learned:
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Data science is the study of large quantities of data, which can reveal insights that help organizations make strategic choices. λ°μ΄ν° κ³Όνμ μ‘°μ§μ΄ μ λ΅μ μ νμ νλλ° λμμ΄λλ ν΅μ°°λ ₯μ 보μ¬μ€ μ μκ² λλμ λ°μ΄ν°λ₯Ό μ°κ΅¬νλ νλ¬Έμ΄λ€.
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There are many paths to a career in data science; most, but not all, involve a little math, a little science, and a lot of curiosity about data. λ°μ΄ν° κ³Όν λΆμΌμλ λ§μ κΈΈμ΄ μλ€; μ λΆκΉμ§λ μλμ§λ§, λλΆλΆμ, μ½κ°μ μν, μ½κ°μ κ³Όν, κ·Έλ¦¬κ³ λ°μ΄ν°μ λν λ§μ νΈκΈ°μ¬μ μλ°νλ€.
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New data scientists need to be curious, judgemental and argumentative. μλ‘μ΄ λ°μ΄ν° κ³Όνμλ€μ νΈκΈ°μ¬ λ§κ³ , νλ¨λ ₯ μκ³ , λ Όμμ μ΄μ΄μΌ νλ€.
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Why data science is considered the sexiest job in the 21st century, paying high salaries for skilled workers. λ°μ΄ν° κ³Όνμ 21μΈκΈ°μ κ°μ₯ μΉμν μ§μ μΌλ‘ μ¬κ²¨μ§λ©°, μλ ¨λ λ Έλμλ€μκ² λμ κΈμ¬λ₯Ό μ§κΈνλ€.