Qualitative vs. Quantitative

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Presentation transcript:

Qualitative vs. Quantitative Data Collection and Analysis

What’s the Difference? Two different methods. Difference in questions asked. Difference in experiment choice. Difference in data summary.

Quantitative Think NUMBERS. Quantitative = Quantity Things that can be measured. Length, Height, Mass, Volume, Time, Speed. Assigned a Number value.

Example Tree in the woods Quantitative Data 15 m tall 230 cm in diameter at trunk 312 cm circumference

Another Example Glass of sea water 17°C 437 ml in volume 437 g in mass

Qualitative Think DESCRIPTION Qualitative = Quality Things that are seen but not measured. Texture, Color, Smell, Taste, Movement, Behavior, etc.

Example Tree Again Branches restricted to upper 3rd of trunk. Qualitative Brown trunk, bark is rough and flaky. Leaves are needle shaped Branches restricted to upper 3rd of trunk. Stiff/Rigid, little sway in wind.

Example 2 Sea Water Qualitative Strong salt odor. Cloudy Low viscosity Strong salt odor. Visible floating materials – small and suspended.

Review Quantitative Qualitative NUMBERS Length, Mass, Volume Measurements Length, Mass, Volume Qualitative DESCRIPTION Observations Smell, Texture, Behavior