StatsYaar – Learn Fundamentals of Statistics

  Data Analyst vs Data Scientist: What’s the difference?      Confused by the data analyst vs data scientist debate? they sound so similar. Let’s untangle the confusion.  A Data Analyst explains what happened and why. A Data Scientist predicts what will happen and builds systems to make it happen.  Think of it this way: An analyst might tell you “Sales in the store dropped 15% last quarter because of Supplier X delays.” A scientist would build a model that predicts which supplier will delay next month, and automatically reroute orders before it happens.  Data Analyst Essentials You’re the bridge between data and decisions. Your superpower is clarity.  Key Tools: SQL (your bread and butter), Excel/Google-Sheets, BI platforms like Tableau or Power BI. A bit of Python or R for cleaning data is a huge plus. Statistics in Action: Your best friend is descriptive statistics—means, medians, trends. You live in dashboards, crafting visuals that make com...

What is Demography? Demography (Population Study) is the scientific study of human population, concerned with population size, composition, distribution and changes due to fertility, mortality and migration.  The chart below illustrates a visual example of demography, showing Pakistan’s population growth from 1951 to 2023: Vital Events Vital events are major events of human life that affect the size, composition and distribution of a population.  Examples: Births, deaths, divorces, marriages, migrations etc. Vital Statistics The numerical records of vital events in a population.  Example: 2000 died in this year and 3000 born etc. Key Aspects of Population Studies Population Size The total number of individuals living in a specific area. Example: A city has a population size of 2.5 million. Here, 2.5 million is the population size of that city.  Population Composition The characteristics of the population such as age, sex, ethnicity, religion, education...