Leanne manages an apartment building that houses 100 residence. She read an article claiming that 15% of people in their state were senior citizens, and she thought it may be hired for residence in her building. She took a random sample of 20 residents, and she wants to test Ho : P = 0.15 versus Ha : > 0.15, where p is the proportion of residents that are seniors.

Which conditions for performing this type of test did leannes sample meet?

Choose the best answer

a. The data is a random sample from the population of interest

b. The expected counts of successes and failures are both sufficiently large

c. Individual observations can be considered independent