The student senate at a university with 15,000 students is interested in the proportion of students who favor a change in the grading system to allow for plus and minus grades (e.g., B, B, B, rather than just B). Two hundred students are interviewed to determine their attitude toward this proposed change. What is the population of interest? What group of students constitutes the sample in this problem?

Lecture3-SamplingBasics Tuesday,August23,2:00PM • ○ ^Reviewfromthepreviouslecture • Population andSample ○ Population- everybodythattheresearchistargeting § Populationresultsarecalled populationparameters ○ Sample- thesubsetofthepopulationthatactuallyparticipatesintheresearch § Makesdatacollectionmanageable § Sampleresultsarecalled samplestatistics § Youcancalculatetheaverageofsomethingbasedonasample ○ Instatisticsingeneral,youwanttogeneralizeapopulationbytakingasamplefromit Lecture3-SamplingBasics Tuesday,August23,2:00PM • ○ ^Reviewfromthepreviouslecture •