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Fundamentals of Data Analytics Flashcards

7 cards from real DAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Fundamentals of Data Analytics flashcards as text

  1. Which type of analytics answers the question 'What happened?'

    Answer: Descriptive analytics

    Descriptive analytics summarizes historical data to describe what happened.

  2. A data analyst wants to understand WHY sales dropped last quarter. Which analytics type applies?

    Answer: Diagnostic analytics

    Diagnostic analytics investigates the causes behind an observed outcome.

  3. What is the primary purpose of data cleaning?

    Answer: To remove errors, duplicates, and inconsistencies

    Data cleaning improves quality by fixing errors, duplicates, and inconsistencies.

  4. Which measure of central tendency is most affected by outliers?

    Answer: Mean

    The mean shifts significantly when extreme values are present.

  5. In a dataset, 'structured data' refers to information that is:

    Answer: Organized in rows and columns

    Structured data fits neatly into rows and columns, like a database table.

  6. What does the acronym KPI stand for in analytics?

    Answer: Key Performance Indicator

    A KPI is a Key Performance Indicator used to measure progress toward goals.

  7. Which chart type is best for showing the composition of a whole at a single point in time?

    Answer: Pie chart

    A pie chart displays parts of a whole as proportional slices.