An analyst wants to see how a data set shifts from one month to the next over six months. Which technique is most effective for revealing these changes?
Compare the average of each month to a single overall value for the six-month span
Calculate correlation coefficients among monthly values for one metric
Record and review good or incomplete data entries for each month
Plot the monthly data in a line chart to track changes from one month to another
Plotting the monthly data in a line chart emphasizes the shift between each period. It highlights trends and dips that may not be visible with partial comparisons or focusing on specific data points alone. Examining missing data does not measure changing trends. Focusing on correlation does not track changes in one metric over time. Combining data into a single summary obscures monthly movement.
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What are the advantages of using a line chart to visualize data trends over time?
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What are some common metrics that can be tracked using line charts?
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What other visualization techniques can be used to analyze changes in data over time?