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Chapter 5 · Data Analysis: A Concise Overview of Statistical Techniques · Slide 166/274

Cumulative Tables and Ogives

shows the sum of the frequencies up to and including the respective row.

5.1.2 · Organizing Quantitative DataGraphical Representation

Cumulative Tables and Ogives

Cumulative Table

shows the sum of the frequencies up to and including the respective row.

Ogive

is the graph of the cumulative relative frequency across all classes.

∅ Time in Transit · each row adds the previous relative frequency
∅ TimeRelative FrequencyCumulative Rel. Frequency
16–17.91/15 ≈ 0.070.07
18–19.92/15 ≈ 0.130.07+0.13 0.20
20–21.91/15 ≈ 0.070.20+0.07 0.27
22–23.96/15 ≈ 0.400.27+0.40 0.67
24–25.92/15 ≈ 0.130.67+0.13 0.80
26–27.91/15 ≈ 0.070.80+0.07 0.87
28–29.91/15 ≈ 0.070.87+0.07 0.94
30–31.91/15 ≈ 0.070.94+0.07 1.00
→
Average Time in Transit
CUMULATIVE REL. FREQUENCY0.00.20.40.60.81.0161820222426283032TIME (MINUTES)
QUESTIONSTAR · Dr. Paul Marx166 / 274
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