A researcher wants to know the average age of teachers in a certain community. 50 teachers from junior high school and 25 teachers from senior high school were interviewed for the purpose. How will the researcher choose a sample size of 20 using:1. Simple Random Sampling -2. Systematic Random sampling -3. Stratified Random Sampling -4. Cluster Sampling -

Which number is main idea? i need answer quick. (1) people may think that love and romantic feelings are enough of a basis for choosing a spouse. (2) the chances of a marriage surviving, however, would improve if prospective marriage partners considered a few unromantic questions before deciding on matrimony. (3) for example, do the two individuals involved share a common socioeconomic background? (4) the more similar they are in their social, economic, religious, and cultural backgrounds, the more similar their expectations about married life will be. (5) in addition, what are their goals? (6) it’s a big advantage to the marriage if they know and share one another’s goals concerning career, lifestyle, and family. (7) finally, and maybe most important, how does the prospective spouse treat others in his or her life? (8) during the courtship, the boyfriend or girlfriend may get special consideration, but in the long run, spouses will probably treat each other about the same way they treat their own family members.

You are getting ready to transport troops in a m1152 configured with cargo cover and troop seats which of the following should you do before starting out

If inflation is 6% and nominal gdp grew by 4%, then during the same period real gdp changed by a) -2% b) 2% c) 4% d) 5%