Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%)...

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Sampling Design Overview

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Transcript of Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%)...

Page 1: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Sampling Design

Overview

Page 2: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

II. Sampling and Experimentation

Planning and conducting a study (10%-15%)

Data must be collected according to a well-developed plan if valid information on a conjecture is to be obtained. This includes clarifying the question and deciding upon a method of data collection and analysis.

Page 3: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

A. Overview of methods of data collection1. Census

2. Sample survey

3. Experiment

4. Observational study

II. Sampling and Experimentation

Page 4: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

1. What is a census?

Page 5: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

1. What is a census?

A survey of every member of a population.

Page 6: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

2. Why do we take samples?

Page 7: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

2. Why do we take samples?

A census is too difficult/too expensive.

A sample can give us good information about the population much more cheaply and easily.

Page 8: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

3. What is a sampling frame?

Page 9: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

3. What is a sampling frame?

The list of the population we use to generate a sample.

Page 10: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

4. Why is randomization important?

Page 11: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

4. Why is randomization important?

To reduce sample selection bias.

Page 12: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

5. What is bias?

Page 13: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

General questions

4. What is bias?

A description of a sampling method that tends to overestimate or underestimate the population parameter.

Page 14: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2007 AP Exam

Page 15: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: E

Page 16: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

B. Planning and conducting surveys1. Characteristics of a well-designed and well-

conducted survey

2. Populations, samples, and random selection

3. Sources of bias in sampling and surveys

4. Sampling methods, including simple random sampling, stratified random sampling, and cluster sampling

II. Sampling and Experimentation

Page 17: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 18: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 19: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: B

Page 20: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 21: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: B

Page 22: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2007 AP Exam

Page 23: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: E

Page 24: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: AP Course Description

Page 25: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: E

Page 26: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 27: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: C

Page 28: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: AP Practice Exam

Page 29: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: C

Page 30: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: AP Practice Exam

Page 31: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: E

Page 32: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

D. Generalizability of results and types of conclusions that can be drawn from observational studies, experiments and surveys

II. Sampling and Experimentation

Page 33: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: AP Practice Exam

Page 34: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Answer: B

Page 35: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2004 AP Exam Form B

Discuss in groups.

Page 36: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 37: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 38: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 39: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2011 AP Exam

Discuss in groups.

Page 40: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2011 AP Exam

Page 41: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 42: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.
Page 43: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2010 AP Exam Form B

Page 44: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2010 AP Exam Form B

Page 45: Sampling Design Overview. II. Sampling and Experimentation Planning and conducting a study (10%-15%) Data must be collected according to a well- developed.

Source: 2010 AP Exam Form B


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