posted by Joel .
Of 100 people who were given a vaccine,80 developed immunity to a disease.the 98% interval on the proportion of people developing immunity is?need help
CI98 = p + or - (2.33)[√(pq/n)]
p = 80/100
q = 1 - p
n = 100
Convert fractions to decimals.
Substitute values into formula.
I'll let you take it from here.