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The Lumenary
Chekechea–Darasa la 2Probability & StatisticsImepangwa

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

Onyesha kila kinachohitajika kufikia mada hii

Somo la mada hii bado halijaandikwa. Muhtasari ulio hapa chini ni sehemu ya ramani ya mtaala na haujakaguliwa.

Inajengwa juu ya

Counting

Masharti ya awali ya lazima 2 (hadi chini kabisa)

Utajifunza

  • 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.

Fasili

  • 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.

Nadharia

  • 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.

Mawazo potofu ya kawaida

  • Comparing rows of pictures of different sizes by their length.
  • Counting one answer in two categories.

Inaelekea kwa

Data displays and the mean as a fair share

Ugunduzi wa hiari