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Data Analytics 10 Slides

See Your Data, Tell Your Story.

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Guide Notes & Explanation

Accompanying breakdown for this slide deck

  • See Your Data, Tell Your Story.

The Universal Workhorse

  • Bar charts compare quantities across different categories.
  • Use them to show rankings or highlight differences.
  • Vertical bars are called column charts.
  • Horizontal bars are best for long category names.
  • Avoid cluttering with too many categories.
  • Stacked bars show part-to-whole relationships.

Tracking Trends Over Time

  • Line charts show data trends at equal intervals.
  • Perfect for visualizing progress and changes over time.
  • Use them to plot continuous data like sales or growth.
  • Multiple lines can compare different trends.
  • Keep lines distinct and easy to differentiate.
  • The X-axis must represent a continuous scale (e.g., time).

Location Matters

  • Maps display data points based on geographical location.
  • They reveal regional patterns, trends, and concentrations.
  • Use them for sales territories, customer density, or logistics.
  • Choropleth maps color regions to represent values.
  • Bubble maps use sized circles to show magnitude.
  • Ensure your audience is familiar with the geography shown.

Drilling Down Data

  • The decomposition tree breaks down a measure by multiple dimensions.
  • It is interactive, allowing users to explore data freely.
  • Perfect for ad-hoc analysis and root cause investigation.
  • It automatically visualizes the impact of different factors.
  • No pre-built hierarchies are needed for exploration.
  • It helps answer "why" something happened.

The Story of Change

  • Waterfall charts show a running total as values are added or subtracted.
  • They illustrate how an initial value reaches a final value.
  • Ideal for revealing the cumulative effect of sequential changes.
  • Commonly used for financial statements like profit and loss.
  • The first column is the starting value, the last is the total.
  • Intermediate columns show increases (green) and decreases (red).

Choosing Your Visual

  • Match the chart type to your story and data.
  • Comparing categories? Use a bar chart.
  • Showing a trend over time? A line chart is best.
  • Need geographical insight? Choose a map.
  • Decomposing factors? Use a decomposition tree.
  • Explaining sequential changes? A waterfall chart fits.

Clarity is Key

  • Always start with a clear question for your data.
  • Label your axes and provide a clear title.
  • Remove any unnecessary clutter or decoration.
  • Use color strategically to highlight important information.
  • Ensure your visual tells a story at a glance.
  • The goal is to communicate insight, not just show data.

Master Your Narrative

  • Practice building these core five visuals.
  • Your analysis is only as strong as your communication.
  • Great visuals make complex data understandable.
  • They empower your audience to make informed decisions.
  • Start using these charts to tell powerful data stories.
  • What is your go-to chart? Share in the comments.