According to a very large poll in 2015, about 90% of homes in California had...
According to a very large poll in 2015, about 90% of homes in California had access to the internet. Market researchers wonder if that proportion is now higher, so they take a random sample of 200 homes in California and find that 196 have access to the internet. They want to use this sample data to test H0:p = 0.9 versus Ha:p > 0.9, where p is the proportion of California homes with internet access. Which conditions for performing this type of significance test have been met?
Choose all answers that apply.
I. The data is a random sample from the population of interest.
II. np ≥ 10 and n (1 - p) ≥ 10
III. Individual observations can be considered independent.