The Confidence Interval Machine
1 · The population,
(drag to redraw):
μ =
–
, σ =
–
We've covered:
Binom(10, 0.75)
Pois(6)
Exp(6)
N(70, 3²)
Or something strange:
Flat
Dragon (long tail)
Bunny ears (two humps)
Spikes
Chaos
Hide distribution and pick a random one
Reveal
2 · Pull samples, build intervals
Sample size n =
40
Pull 1 sample (watch it)
Pull 100
Pull 1,000
Clear intervals
Confidence:
90%
95%
99%
Critical value from:
z
t
=
–
3 · The confidence intervals
0
intervals built
–
captured μ
–
percent that captured μ (we asked for
95
%)