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# Sampling and Data: Sampling Experiment Lab II

Summary: This module provides students an opportunity to practice data sampling techniques. Students will demonstrate the simple random, systematic, stratified, and cluster sampling techniques, and explain the details of each procedure. This lab is based on one originally created by Carol Olmstead. Note: This module is currently under revision, and its content is subject to change. This module is being prepared as part of a statistics textbook that will be available for the Fall 2008 semester.

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Class Time:

Names:

## Student Learning Outcomes

• The student will demonstrate the simple random, systematic, stratified, and cluster sampling techniques.
• The student will explain each of the details of each procedure used.

## Note:

The following page contains restaurants stratified by city into columns and grouped horizontally by entree cost(clusters).

In this lab, you will be asked to pick several random samples. In each case, describe your procedure briefly, including how you might have used the random number generator, and then list the restaurants in the sample you obtained.

## Simple Random Sample

Pick a simple random sample of 15 restaurants.

Procedure:

 1 6 11 2 7 12 3 8 13 4 9 14 5 10 15

## Systematic Sample

Pick a systematic sample of 15 restaurants.

Procedure:

 1 6 11 2 7 12 3 8 13 4 9 14 5 10 15

## Stratified Sample by Cost

Pick a stratified sample, by entree cost, of 20 restaurants with equal representation from each stratum.

Procedure:

 1 6 11 16 2 7 12 17 3 8 13 18 4 9 14 19 5 10 15 20

## Stratified Sample by City

Pick a stratified sample by city, of 21 restaurants with equal representation from each stratum.

Procedure:

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## Cluster Sample

Pick a cluster sample of restaurants from two cities. The number of restaurants will vary.

Procedure:

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Table 6: Restaurants Used in Sample (Example)
Entree Cost → Under $10$10 to under $15$15 to under $20 Over$20
San Jose El Abuelo Taq, Pasta Mia, Emma's Express, Bamboo Hut Emperor's Guard, Creekside Inn Agenda, Gervais, Miro's Blake's, Eulipia, Hayes Mansion, Germania
Palo Alto Senor Taco, Olive Garden, Taxi's Ming's, P.A.Joe's, Stickney's Scott's Seafood, Poolside Grill, Fish market Sundance Mine, Maddalena's, Spago's
Los Gatos Mary's Patio, Mount Everest, Sweet Pea's, Andele Taqueria Lindsey's, Willow Street Toll House Charter House, La Maison Du Cafe
Mountain View Maharaja, New Ma's, Thai-Rific,Garden Fresh Amber Indian, La Fiesta, Fiesta Del Mar, Dawit Austin's, Shiva's, Mazeh Le Petit Bistro
Cupertino Hobees, Hung Fu, Smarat, Panda Express Santa Barb. Grill, Mand. Gourmet, Bombay Oven, Kathmandu West Fontana's, Blue Pheasant Hamasushi, Helios
Sunnyvale Chekijababi, Taj India, Full Throttle, Tia Juana, Lemon Grass Pacific Fresh, Charley Brown's, Cafe Cameroon, Faz,Aruba's Lion Compass, The Palace, Beau Sejour
Santa Clara Rangoli, Armadillo Willy's, Thai Pepper, Pasand Arthur's, Katie's Cafe, Pedro's, La Galleria Birk's, Truya Sushi, Valley Plaza Lakeside, Mariani's

** The original lab was designed and contributed by Carol Olmstead.

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