AtlasSession 2L5: Introduction to Numerical Concepts in Researchp.59–70
Confidence intervals
Fig. 1
Cell viability (%) on electrospun PCL scaffolds, Live/Dead assay: each sample is n wells
Fig. 1. Cell viability of samples of 25 wells from a population with true average 82 %. No samples yet: press Play or +1.
- Samples so far
- 0
- Latest average
- — (no samples yet: press Play or +1)
- Ranges that caught the true average
- 0 of 0 (no samples yet: press Play or +1)
- Caught so far
- — (no samples yet: press Play or +1)
Sampling Simulator · First look
nothing drawn yet
Level 1 · First look · Lecture 5 · p.59–70
See why one sample's average wobbles, and give a range that is likely to catch the true average.
Compute the SE and a 95% CI from mean, SD and n, and explain what '95%' does and does not mean.
Samples wobble (the step you are on)
Three spoons of one soup taste slightly different; three batches of 25 wells give different viability averages.
Three samples of 25 wells from the same scaffolds give three different averages; the latest is — (no samples yet: press Play or +1)%. Press Acquire a sample for another.