Recent content by jackjack583

  1. J

    Little problem that I'm struggling to solve...

    The proportion of smokers in a certain population is 25%. What is the probability that smokers' proportion in a sample of 40 people randomly selected from this population will be below (strictly less than) 20%. Surely you would use the binomial table N = 40 P = 0.25 X = 8 (since below 20% =...