Quiz 2a

Graphing and Charting

1. What values are used to form the “box” in a box-plot?

a) minimum and maximumb) quartiles 1 and 3 (Q1 and Q3)

c) median +/–1 SDd) mean +/–1 SD

2. Which graphing method is best for nominal data?

a) bar graphb) histogramc) stem-plotd) line graph

3. What is incorrect about the histogram below?

a) right bar has different widthb) middle bar has different widthc) values on abscissa should be in reverse order

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0-10 11-20 21-30 31-50 51-60 61-70 >70

Age (years)

Fre

qu

ency

4. What is the name of the graph at right?

a) stem-plotb) box-plotc) pie chartd) pictograph

5 | 4 6 7 9 6 | 3 4 6 8 8 7 | 2 2 5 6 8 | 1 4 8 9 |10| 6

5. What is misleading about the graph at right?

a) bias is introduced by the position of values around the circleb) January should be at the one-o’clock positionc) area of a “petals” increase nonlinearly (½r2) causing a bias

6. What’s the name of the graph at right?

a) bar graphb) histogramc) frequency

polygond) ogive

Battery life (hours)21 27 34 41 48 55 62

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Longevity of boat batteries