Download presentation

Presentation is loading. Please wait.

Published byAbigale Countess Modified over 2 years ago

1
A guide for gathering data

2
Learning Objectives Sampling Methods Random Sampling Systematic Sampling Stratified Sampling Cluster Sampling Convenience Sampling Sampling Videos Sampling Relationships Example 1: Identifying Sampling Methods Example 2: Utilizing Sampling Methods References 2Sarah DiCalogero - Statistical Sampling

3
Define the five basic sampling methods Random Systematic Stratified Cluster Convenience Identify sampling methods in an example Use sampling methods to choose data 3Sarah DiCalogero - Statistical Sampling

4
The pick a name out of the hat technique Random number table Random number generator Hawkes and Marsh (2004) 4Sarah DiCalogero - Statistical Sampling

5
All data is sequentially numbered Every nth piece of data is chosen Hawkes and Marsh (2004) 5Sarah DiCalogero - Statistical Sampling

6
Data is divided into subgroups (strata) Strata are based specific characteristic Age Education level Etc. Use random sampling within each strata Hawkes and Marsh (2004) 6Sarah DiCalogero - Statistical Sampling

7
Data is divided into clusters Usually geographic Random sampling used to choose clusters All data used from selected clusters Hawkes and Marsh (2004) 7Sarah DiCalogero - Statistical Sampling

8
Data is chosen based on convenience BE WARY OF BIAS! Hawkes and Marsh (2004) 8Sarah DiCalogero - Statistical Sampling

9
Random and Stratified Random Sampling Random and Stratified Random Sampling (YouTube, 2009) Cluster and Systematic Sampling Cluster and Systematic Sampling (YouTube, 2009) 9Sarah DiCalogero - Statistical Sampling

10
Random Sampling Cluster Sampling Stratified Sampling 10Sarah DiCalogero - Statistical Sampling

11
In a class of 18 students, 6 are chosen for an assignment Sampling TypeExample RandomPull 6 names out of a hat SystematicSelecting every 3 rd student StratifiedDivide the class into 2 equal age groups. Randomly choose 3 from each group ClusterDivide the class into 6 groups of 3 students each. Randomly choose 2 groups ConvenienceTake the 6 students closest to the teacher 11Sarah DiCalogero - Statistical Sampling

12
Determine average student age Sample of 10 students Ages of 50 statistics students Sarah DiCalogero - Statistical Sampling

13
Random number generator Data Point Location Corresponding Data Value Mean Sarah DiCalogero - Statistical Sampling

14
Take every data point Data Point Location Corresponding Data Value Mean Sarah DiCalogero - Statistical Sampling

15
Take the first 10 data points Data Point Location Corresponding Data Value Mean Sarah DiCalogero - Statistical Sampling

16
16Sarah DiCalogero - Statistical Sampling

17
Hawkes, J., & Marsh, W. (2004). Discovering Statistics (2nd ed.). Charleston, SC: Hawkes Publishing Inc.. YouTube. (2009). Random Sample. Retrieved from A&feature=related A&feature=related YouTube. (2009). Types of Random. Retrieved from 9E&feature=related 9E&feature=related 17Sarah DiCalogero - Statistical Sampling

Similar presentations

© 2017 SlidePlayer.com Inc.

All rights reserved.

Ads by Google