Making sense of data: averages, spread, and how to build and read frequency tables and charts - the same tools used to summarise exam results or rainfall records.
Three ways to describe "the middle"Mean: add everything up, divide by how many there are - like sharing a bag …
View LessonOrganising raw dataInstead of listing every single mark one by one, group and count them - like a shopkeeper tallying …
View LessonRangeThe spread of the data - highest value minus lowest value. Like the difference between the hottest and coldest day …
View LessonFind the mean, median and mode of: 3, 5, 5, 8, 9.Find the mean of: 12, 15, 18, 21, 24.Six …
View Exercise Submit ExerciseData: 2,3,3,4,2,5,3,4,2,3. Draw a frequency table.Using your table, find the mode.Using your table, calculate the mean.
View Exercise Submit ExerciseFind the range of: 22, 18, 30, 15, 27.A frequency table shows marks 4,5,6,7 with frequencies 2,5,6,3. Sketch a bar …
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