Pictograms and tally charts
Interpret and construct simple pictograms, tally charts, block diagrams, and simple tables
What a learner can do afterwards
- Read a pictogram where each symbol represents one item
- Construct a tally chart from collected data
- Draw a block diagram to represent data from a survey
1 · Read
You already know how to read a pictogram, where each little picture stands for one item. Now let's learn two more ways to show data: tally charts and block diagrams.
Mia asked her class which fruit they liked best. She drew a tally mark for every answer, then counted the tallies and drew a block for each fruit. The tallest block shows apple was the favourite.
When you make a tally chart, count in fives. Draw four lines standing up, then draw the fifth line across them. A crossed group of five is easy to spot and count fast.
A tally chart counts with grouped marks, and a block diagram turns those counts into blocks you can compare at a glance.
More to read
Data: FAQ
Data are facts we collect by counting and watching. Tallies, lists, and tables keep the counts tidy so patterns pop out. Picture graphs and block diagrams turn counts into images you can compare at a glance. Always start by asking what question the data should answer. Then sort every answer into a group and count each group.
41.1: Got Data?
Data starts with a question you care about, like which pet is most loved. Ask everyone the same question and record each answer with a tally or mark. Neat records stop double counts and missed friends. Good data makes the chart that follows honest. Sort the answers into two or three groups before you draw anything.
42.1: Representing Data Graphically
Charts turn bare counts into pictures that speak fast. In a pictograph each symbol stands for one item, so longer rows mean bigger counts. Tally charts group marks in fives for quick totals. Block diagrams stack one block per item to compare groups side by side. Read the labels first, then compare the heights or lengths.
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2 · Watch
به انگلیسیTake it off screen
Where it sits
Where this leads
Jobs that lean on this skill. Follow one to see everything it is built on.
18 questions wait behind this lesson, each with its answer explained. Every answer feeds the sky: stars light as they are learned, and dim when it is time to come back.