Maths · KS3 Y9 · Statistics

Estimating a grouped mean

Estimating a grouped meanFree8:54Heddy Score 3 of 7, below the standard
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What you need to know

  • Estimate each grouped class midpoint and multiply it by the class frequency.
  • Add the midpoint-frequency products and divide by the total frequency to estimate the mean.
  • Because the individual values are not known, the result is an estimate.

In this clip

Runs 8:54, from 0:11 to 9:05 of the full video.

Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
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Our own students' answers. These are what move ★7 Proven.
On YouTube

273K views · 3.3K likes · 1st Class Maths 313K subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
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Why we picked it

It explains the midpoint method for estimating the mean from grouped data.

1st Class Maths on YouTubechecked 2026-10-20

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