CHAPTER 1 REVIEW

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CHAPTER 1 REVIEW MISCONCEPTIONS AND
CLARIFICATIONS
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STEM AND LEAFCreate a stem and leaf for the
data, then split stems.
It is OK to round data if you are creating a
graphical display. We are only interested in a
general shape of the data.
What 3 things must be addressed when describing a
distribution?
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HISTOGRAMS

• What is a histogram?
• How does it display data?

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DETERMINING OUTLIERS

• Use 1.5 x IQR to determine if a point is an
  outlier.
• Good and bad box plots
• Good. Bad.

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COMPUTING STANDARD DEVIATION
xi
1.4 .1 .01
2.2 .7 .49
1.1 .4 .16
1.6 .1 .01
1.2 .3 .09
What are deviations? What is variance? What does
standard deviation tell us?
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PERCENTILES AND OGIVES
What is meant by the 40 percentile?
What do you read on an ogive?