EasyStatistics & Data ScienceHigh School (9–10)High School (11–12)UndergraduateGeneralStatistics Basics › Learning from SamplesStatistics Basics › Data and SamplingNumerical
In a made-up town, 60% of the adults walk for at least half an hour every day…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In a made-up town, of the adults walk for at least half an hour every day. A health worker asks adults, chosen at random, and of them say yes. Find the sample share. Find how far it is from the true share. Is the health worker's sample wrong?
Need a reminder? The key ideaShow
A parameter describes the population, and a statistic describes one sample. A statistic changes from sample to sample by chance, and listing every possible sample shows its whole pattern.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. .
Step 2. .
Answer: , a miss of . The sample is not wrong. A random sample of usually misses by a few hundredths, by chance alone.
Discussion (0)
Log in to join the discussion.
Loading…