ary school (grades 1 - 5) is considering making changes to the bus schedule. She selects a random sample of 100 students from each grade and contacts the students’ families regarding the bus schedule. What sampling technique is used in this e

For the scenarios below, determine which sampling method was used (simple random, cluster, convenience, stratified, systematic), and briefly state how you were able to identify the type of sampling being used. Please note: each sampling method will be used only once.   -A student surveys 30 people who happen to be on campus at 1:00 pm on a Monday.         -Students are divided into groups by number of years at the college, and then a simple random sample is drawn from each group.       -Students are divided into groups based on income level, 3 income levels are randomly selected, and all students within the selected income groups are surveyed.       -50 students are selected by using their student ID numbers, and a random number generator.         -Students are selected by selecting every 10th name off of a list of all current students at STS.

Amanda is writing an article for the school newspaper about social media use among teens. She wants to include information about the percentage of the students at her high school using Facebook, Instagram, Snapchat, or Twitter. Instead of doing a census of the 2600 students at her high school, Amanda decides to select a simple random sample of 60 students and ask them to complete a short survey. Which of the following sampling techniques describes a method of selecting a simple random sample that would allow Amanda to estimate the percentage of students at her high school that use each type of social media? Mark one option in each row of the table, Is this a simple random sample? Yes No Amanda asks the 36 student staff members of the school newspaper and A the 24 student staff members of the yearbook to complete the survey. With the assistance of the newspaper's faculty sponsor, Amanda gets a list of every student in her school. She assigns each student a number from В 0001 to 2600.…

A university has 30,000 undergraduate and 10,000 graduate students. A survey of student opinion concerning health care benefits for domestic partners of students selects 300 of the 30,000 undergraduate students at random and then separately selects 100 of the 10,000 graduate students at random. The 400 students chosen make up the sample. Is the sample design described above a simple random sample (SRS)? Explain why or why not.