Questions about the Samples and Populations poster

What’s on the Samples and Populations poster?

GOOD SAMPLE against BIASED SAMPLE, side by side. GOOD SAMPLE: Chosen at random; GOOD SAMPLE: Big enough to be stable; GOOD SAMPLE: Represents the whole population; GOOD SAMPLE: Everyone had an equal chance; GOOD SAMPLE: Conclusions can be generalised; BIASED SAMPLE: Convenient rather than random; BIASED SAMPLE: Too small to be reliable; BIASED SAMPLE: Misses whole groups; BIASED SAMPLE: Self-selected — only the keen replied; BIASED SAMPLE: Conclusions do not transfer; Surveying the school football team about favourite sport is a biased sample, no matte…. A random sample of 100 beats a biased sample of 10,000. Size does not fix bias.

Who is the Samples and Populations poster for?

Samples and Populations is filed under 7th Grade (ages 12–13), so it matches what that year asks a child to remember. It is equally useful to an older student revisiting math, and to the parent or teacher answering the question at the kitchen table.

When should you use the Samples and Populations poster?

Ask who was left out of the sample. That is usually where the bias is. A wall chart earns its place by being glanceable from where the work is happening, so Samples and Populations belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.

What other posters go with Samples and Populations?

Box Plots, Measuring Spread and Angle Pairs sit alongside Samples and Populations in the 7th Grade set. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Box PlotsMeasuring SpreadAngle Pairs

Is the Samples and Populations poster free to download and print?

Yes. Samples and Populations downloads as a free PDF with no account, no email and no watermark, like everything else in the 7th Grade set. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence

What size does the Samples and Populations poster print at?

Samples and Populations is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Samples and Populations loses nothing.Printing guide