Question

According to a recent poll, 80% of the respondents who were 18 years or older stated that the
minimum voting age should be 18. A random sample of 8 respondents was taken
a) Is this a binomial experiment? If so identify p and q .
b) Find the mean and standard deviation.
c) find the probability that

i) exactly 5 believe that the minimum voting age should be 18.
ii) more than 5 believe the minimum voting age should be 18.
iii) between five and seven inclusive believe the minimum voting age should be
18.
d) If in a random sample of 200 respondents, 160 said the minimum voting age should be 18,
is this an unusual event? Why or why not?

Answer 1