Question 1A ______ sample is a sample in which each member of the population has a known, nonzero,chance of being selected for the sample.probabilitysystematicsimple randomconvenienceQuestion 2In _______ sampling, we divide the population into mutually exclusive groups and randomlysample from each of these groups.stratifiedclusterprobabilitysimple randomQuestion 3Deanna has been hired to visit the local shopping mall to conduct a survey about the upcomingpolitical election. She needs to select respondents at the mall and ask them questions about theirvoting tendencies. Deanna decides to walk around the mall and select shoppers to participate.Which of the following sampling techniques best describes Deanna's method?conveniencesystematicsimple randomstratifiedQuestion 4The average weight of the entire batch of the boxes of cereal filled today was 20.15 ounces. Arandom sample of four boxes was selected with the following weights: 20.05, 20.56, 20.72, and20.43. The sampling error for this sample is _______.