P^ = x/N
P^ = 100/1000 = 0.1
m = z*se
m = z * √p^(1-p^)/n
m = 0.019
z distribution μ=0, σ=1 -1.96, 1.96
N = 2000, x = 300
p^ = 300 / 2000
center of confident 0.15
Hypothesis Testing
P(results due to chance)
Pcont, Pexp
Pcont = Pexp
Pexp-Pcont = 0
Size vs. Power Trade-Off
How many page views
α = P(reject null | null true)
