Stadistics

1. A statistics student takes a poll at a local Starbucks tofind out if they support the President’s decision for declaring theconstruction of a southern border wall a national emergency. Hepolls every fifth person that walks into the coffee shop. Whywouldnʹt this sample be representative of the entire US votingpopulation?

2. There are many websites devoted to polling public opinion ona wide range of topics from politics to consumer preferences. Whyare these biased with respect to the general U.S. population?Explain.

3. Identify the sampling technique used to obtain a sample fromrandom, systematic, stratified or convenience sampling. Write thesampling technique in the blank provided. ______________ A group ofpeople are classified according to the county where they live andthen random samples of people from each county are taken.

______________ A lottery ball is selected out an air machine.The valve is open, balls are blown into the tube; they are thentransferred through another clear tube into a display area forreading.

______________ The first 10 people to arrive at a City Councilmeeting are surveyed to find out their opinion on a proposed bondreferendum.

______________ A quality control supervisor pulls every 20thwidget off an assembly line to test for defects.