sqrt(1000*.51*.49)
pnorm(-2.21)
35^2/510 + 35^2/490
sqrt(4.901961)
pchisq(4.901961)
pchisq(4.901961, 1)
1 - pchisq(4.901961, 1)
.02682/2
9.2/sqrt(15)
pt(1.68)
pt(1.68, 14)
1 - pt(1.68, 14)
1 - pnorm(1.68)
1 - pt(1.68, 2)
1 - pt(1.68, 1)
1 - pt(1.68, 29)
1 - pt(1.68, 10000)
1 - pt(1.68, 100000)
1 - pt(1.68, 35)