In 1998 statistics Canada reported that 36% of Canadian households used the internet. George pulled 100 households in his neighbour hood to see if they use the internet more often that the national average
P= n! / k! (n-k)! p^k x q^n-k
n=100 (sample size)
k=60 (probability we need to check)
p=0.36 (population probability of using the Internet)
q=0.64 (population probability of NOT using the Internet)
So you get
P= 100! / 60! (100-60)! 0.36^60 x 0.64^ 100-60
P= 100! / 60! (40)! 0.36^60 x 0.64^ 40
probability = 0.0000005801399090931313
thnks
P= n! / k! (n-k)! p^k x q^n-k
n=100 (sample size)
k=60 (probability we need to check)
p=0.36 (population probability of using the Internet)
q=0.64 (population probability of NOT using the Internet)
So you get
P= 100! / 60! (100-60)! 0.36^60 x 0.64^ 100-60
P= 100! / 60! (40)! 0.36^60 x 0.64^ 40
probability = 0.0000005801399090931313
thnks