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Sampling Methods

Sampling Methods. Sampling Methods. Convenience – use the easiest group you have access to Random – Picked by a random method Systematic – pick every kth person Stratified – Separate according to characteristics – then pick some from each group ( a few from all)

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Sampling Methods

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  1. Sampling Methods

  2. Sampling Methods • Convenience – use the easiest group you have access to • Random – Picked by a random method • Systematic – pick every kth person • Stratified – Separate according to characteristics – then pick some from each group (a few from all) • Cluster – pick all from a couple of groups (all from a few)

  3. What type of sampling method is used? Each student puts a number in the hat and then a drawing is held. Random Sampling

  4. Survey statistics students to see if they had enough time to take the test. We randomly pick some of the schools that took the test & every student at the selected schools are surveyed. Cluster Sampling

  5. Put a big ad in the newspaper asking people to log their opinions on the PTA web site. Convenience Sampling

  6. Randomly select one of the elementary schools and contact every parent by phone. Cluster Sampling

  7. Send a survey home with every student, and ask parents to fill it out and return it the next day. Convenience Sampling

  8. Randomly select 20 parents from each elementary school. Send them a survey, and follow up with a phone call if they do not return the survey within a week. Stratified Sampling

  9. Hold a PTA meeting at each of the 20 elementary schools and tally the opinions expressed by those who attend the meetings. Stratified Sampling

  10. Go through the district’s enrollment records, selecting every 40th parent. PTA volunteers will go to those homes to interview the people chosen. Systematic Sampling

  11. Randomly select two members from each baseball team in the league to represent the city all-star team. Stratified Sampling

  12. Homework • Worksheet

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