Please explain

below. A medical researcher says that less than 24% of adults in a certain country are smokers. In a random sample of 250 adults from that country, 18.4% say that they are smokers. At a =0.05. is there enough evidence to support the researcher's claim? Complete parts (a) through (e) Ho: P Ha PV (Type integers or decimals.) (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are zo = (Round to three decimal places as needed, Use a comma to separate answers as needed.) What is/are the rejection region(s)? Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to three decimal places as needed.) OA. z> O B. z and z O C. 2