In this lesson, learners will be able to:1) construct and interpret cumulative frequency graphs, 2) interpret, analyze and compare the distributions of data sets through quartiles and inter-quartile range The lesson can be used as whole class teaching by teachers and at home by learners.Lots of drag and drop activities with instant feedback. Contains 40 interactive pagesTo open this lesson you need to unzip or extract the files.Choose index.html to view onlineThis lesson can also be viewed offl