Sample Size Roast
[ FIG. 10 ]
PASTE A STAT. RECEIVE CONSEQUENCES.
ONE CLAIM
TWO CLAIMS
THE CLAIM
THE PERCENTAGE
n = ?
THE SECOND CLAIM
PERCENTAGE
n = ?
THE MATH, SHOWN
MARGIN OF ERROR (95%) ±
%
TRUE RANGE
% –
%
STANDARD ERROR
n NEEDED FOR ±3%
Wald interval, p̂ ± 1.96·√(p̂(1−p̂)/n). Small n makes it optimistic, which is the joke.
VERDICT ·
IS THE DIFFERENCE REAL?
GAP
95% CI OF GAP
z
p (two-tailed)
WHAT YOU CAN HONESTLY SAY
THE INTERVAL, TO SCALE
0%
50%
100%
COPY THE HONEST VERSION
ROAST A RANDOM ONE
SAMIEVARGAS.COM
·
MINI APPS
NO STAT WAS HARMED THAT DIDN'T DESERVE IT