Quantitative variables Flashcards
Simplest way to visualize quantitative variables
Dot plot
All the digits of the number but the last
The stem
The final digit
Leaf
Most common way to graph a quantitative variable?
Histogram
Range of data is divided into consecutive, non overlapping intervals called bins
Histogram
Can the bars in a histogram touch and be re arranged?
No
What does the height over bin indicate in a histogram?
The # of measurements within that interval
The histograms ———- variable can be described in terms of shape?
Categoricals
of peaks in a data set
Modality
The distribution is approximately mirrored across a central line of symmetry
Symmetric
Left tail if distribution’s stretched out
Skewed left
Right tail is stretched out
Skewed right
Most data takes a high value with a few low values
Bottom half of data is spread out
Skewed left
Most values will be low with some high values
Top of date is more spread out
Skewed right
