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7 Cards in this Set
- Front
- Back
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Why in a bar graph should the y-axis always start at 0?
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Must start at 0 to be visually accurate. If not, you will accentuate the variance b/w groups.
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Are the y-axes of bar and line graphs measured by frequency (count)?
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No, y-axes are some sort of unit base.
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What is the difference b/w histograms and bar graphs?
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-Bar graphs can have gaps, unlike histograms to which they must be touching.
-Bar graphs must display error bars (ht=arithmic mean). -Histograms display distribution curve. |
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When should you use and not use line graphs?
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-Not use w/ categories for which cannot compare over time. (ex. GRE verbal v. GRE Quant)
-Use when comparing items over a period of time. (ex. Undergrad GPA v. DPT GPA). |
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What probability is +1s or -1s equal to?
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34.13% (z-score=0.3413)
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What probability is +2s or -2s equal to?
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47.72% (z-score=0.4772)
34.13% + 13.59% |
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What probability is +3s or -3s equal to?
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49.87% (z-score=0.4987)
34.13% + 13.59% + 2.14% |
