Comparing Data  
Summary 
two types of statistical graphs which are useful for recording and then comparing more than one set of data are the stem and leaf diagram and the box and whisker plot or diagram. the stem and leaf graph allows easy recording and display of data in order, and the box and whisker diagram is useful for comparing the spreads of two or more sets of data. 
Key Skills 

Vocabulary 
box and whisker diagram, stem and leaf diagram, median, lower quartile, upper quartile, quartile, frequency, digit. 