Preescolar a 2.ºProbability & StatisticsPlanificado
Data, tallies and picture graphs
Asking questions, collecting data by counting, sorting answers into categories, recording with tally marks, and showing results in picture graphs.
math.prob.data-and-tallies
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Se basa en
Requisitos previos obligatorios, hasta el fondo: 2
Aprenderás a
- Collect answers to a simple question and sort them into categories.
- Record counts with tally marks and show them in a picture graph or block graph.
- Answer 'how many more' and 'which is most' questions from a graph.
Definición
- Data are pieces of information collected to answer a question.
- A tally mark records one item; tallies are grouped in fives to make counting easier.
- A picture graph uses one picture for each item, or for a fixed number of items.
Teorema
- If every answer goes into exactly one category, the category totals add up to the number of answers collected.
- Comparing categories by the length of a row of pictures is reliable only when the pictures are the same size and evenly spaced.
Errores frecuentes
- Comparing rows of pictures of different sizes by their length.
- Counting one answer in two categories.
Conduce a
Descubrimientos opcionales
- Statistics: centre, spread and distributions Later, data are summarised by averages and by measures of spread.