Based on a previous study, in 2005, 50% of all American
Solution
Given n=150, p=0.5
mean=n*p=150*0.5=75
s=?n*p*(1-p)=sqrt(150*0.5*0.5)= 6.12
So the probability is
P(X>84)=P((X-mean)/s >(84-75)/6.12)
=P(Z>1.47)
=0.0708 (check standard normal table).
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Based on a previous study, in 2005, 50 of all AmericanSolutio.pdf
1. Based on a previous study, in 2005, 50% of all American
Solution
Given n=150, p=0.5
mean=n*p=150*0.5=75
s=?n*p*(1-p)=sqrt(150*0.5*0.5)= 6.12
So the probability is
P(X>84)=P((X-mean)/s >(84-75)/6.12)
=P(Z>1.47)
=0.0708 (check standard normal table)