Sampling Methods and Research

Choose Random, Systematic or Stratified:

The high school band director wants to survey students about their preferred music genres for the upcoming spring concert. She decides to select every 5th student from the alphabetical roster of 125 band members.

• Random

• Systematic

• Stratified

Choose Random, Systematic or Stratified

To evaluate the effectiveness of a new training program, the women's basketball coach randomly selects 3 players from each position (guards, forwards, and centers) to participate in a feedback session.

• Random

• Systematic

• Stratified

Choose Random, Systematic or Stratified:

The football coach wants to assess team morale. He puts all 60 player names in a hat and draws 15 names randomly.

• Random

• Systematic

• Stratified

Choose Random, Systematic or Stratified:

The choir director wants feedback on new performance robes. She divides the 80 choir members into soprano, alto, tenor, and bass sections, then randomly selects 5 students from each section.

• Random

• Systematic

• Stratified

Choose Random, Systematic or Stratified:

The men's basketball team manager uses a random number generator to select 12 players from the team of 20 to participate in a shooting technique survey.

• Random

• Systematic

• Stratified

Choose Random, Systematic or Stratified:

For a social media usage study, the school counselor selects students by choosing every 10th person who walks through the main entrance on Monday morning.

• Random

• Systematic

• Stratified

Is the research a survey, an observational study, or an experiment?

The drama club advisor splits the cast into two groups during rehearsals: one group practices with background music, while the other practices without. She measures memorization accuracy after 2 weeks.

• survey

• observational study

• experiment

Is the research a survey, an observational study, or an experiment?

To understand teenage skincare habits, researchers send out an online form to 500 high school students asking about their face-washing routines and acne concerns.

• survey

• observational study

• experiment

Is the research a survey, an observational study, or an experiment?

A researcher sits in the bike rack area after school, counting how many students ride bikes versus other transportation methods over 4 weeks.

• survey

• observational study

• experiment

Is the research a survey, an observational study, or an experiment?

A teacher monitors 30 students' social media usage and their corresponding grades over one semester without informing them, noting that students who spend more than 3 hours daily on social media have an average grade drop of 12%.

• survey

• observational study

• experiment