GCSE Maths (AQA)

435 videos | 33 hours

Estimations from Samples

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Statistics Statistics

Estimations from Samples

6:38 Calculations From Samples
Spec S1 S5
Previous Good & Bad Samples Next Petersen Capture-Recapture Method
  • Data from a sample can be used to make estimates about a population
  • It is often easier to survey a sample than the entire population
  • Ratios are a great way of comparing two values
  • The ratio of red flowers in a population can be represented as the ratio of red flowers in a sample
  • Fractions can be created by dividing one value by another in a ratio
  • The equation frequency in population/size of population = frequency in sample/size of sample represents this concept
  • The equation can be used to make calculations and estimates about frequencies in populations
  • An example is given of estimating the number of sandwiches sold in a month based on the number sold in a day and the number of customers
  • The estimate is calculated by multiplying the number of sandwiches sold in a day by the number of customers in a month and dividing by the number of customers in a day
  • The estimate is 360 sandwiches

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.