Research Methodology: Ensuring Validity

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Questions and Answers

What is changeover in manufacturing?

The process of maintaining machines regularly

The process of producing a product from start to finish

The process of inspecting products for quality control

The time from stopping production of one product to starting production of another (correct)

What is the primary focus of reducing batch sizes?

To increase production quantities

To reduce waste and increase efficiency (correct)

To increase machine idle time

To produce a single product continuously

What is the main purpose of quick changeovers?

To increase the time between productions

To reduce the variety of products produced

To minimize downtime between productions (correct)

To reduce the quality of products

Why is reducing changeover time important?

To increase production efficiency and reduce waste Signup and view all the answers

What happens during a changeover?

A machine is converted to produce a different product Signup and view all the answers

What is the result of reducing batch sizes and quick changeovers?

Improved production efficiency and reduced waste Signup and view all the answers

What is the primary goal of implementing batch size reduction and quick changeovers?

To increase production efficiency and reduce waste Signup and view all the answers

What is external validity related to in a research setting?

The degree to which results can be generalized beyond the research setting Signup and view all the answers

What is the primary concern of external validity?

To what extent the results can be generalized to other settings Signup and view all the answers

Why is external validity important in research?

To enable the generalization of findings to other settings Signup and view all the answers

What does external validity measure?

The generalizability of the results beyond the research setting Signup and view all the answers

What is the significance of external validity in research?

To enable the generalization of findings to other settings Signup and view all the answers

What is a common limitation in some studies?

Omission of a no-treatment control group Signup and view all the answers

What is a key aspect of experimental research?

Controlling extraneous variables Signup and view all the answers

Why might a study comparing two therapies be limited?

It lacks a control group with no treatment Signup and view all the answers

What is the primary goal of controlling extraneous variables?

To ensure the results are due to the manipulated variable Signup and view all the answers

What can be a consequence of not controlling extraneous variables?

The results may be influenced by extraneous factors Signup and view all the answers

What is the purpose of check sheets?

To organize data Signup and view all the answers

What is the characteristic of a check sheet?

It is a simple handwritten document Signup and view all the answers

What is the benefit of using a check sheet?

It allows for quick and easy data organization Signup and view all the answers

What is the description of a check sheet?

Simple 'chicken scratches' to organize data Signup and view all the answers

What is the nature of a check sheet?

It is a simple and easy-to-use tool Signup and view all the answers

What is the ideal sampling method in survey research?

Random sampling Signup and view all the answers

What is the difference between a simple random sample and a systematic sample?

One is used for large populations, while the other is used for small populations Signup and view all the answers

What is the primary advantage of using random sampling in survey research?

It helps to minimize bias and ensure representativeness Signup and view all the answers

What is the main characteristic of simple random sampling?

It is a type of probability sampling that randomly selects elements from the population Signup and view all the answers

What is the purpose of using sampling methods in survey research?

To make inferences about a population based on a sample Signup and view all the answers

What is one of the analytical tools used to identify problems?

Histograms Signup and view all the answers

What is the purpose of statistical process control (SPC) in Lean Analytics?

To monitor and control the production process Signup and view all the answers

What is the technique called 'five whys' used for in Lean Analytics?

To identify the root cause of a problem Signup and view all the answers

What is the primary focus of the Lean Analytical tools?

To reduce waste and improve efficiency Signup and view all the answers

What is the benefit of using these analytical tools in Lean Analytics?

To identify and solve problems Signup and view all the answers

Study Notes

Insuring Validity of Web-Based Research

Two ways to demonstrate the validity of web-based research:
- Comparing the results from studies conducted on the Internet with the results of parallel studies conducted using traditional methods
- Direct deception: Deliberately providing misinformation to participants about critical aspects of a study

Visual Factory

Visual factory: Simple visual signals that give operators the information to make the right decision
Characteristics of visual factories:
- Efficient
- Self-regulating
- Worker-managed

Changeover in Manufacturing

Changeover in manufacturing: The time from converting a machine from producing one product to another product
Related concepts:
- Batch size reduction
- Quick changeover

Experimental Research Characteristics

Many experimental studies lack a no-treatment control group, such as comparing two therapies.
Controlling extraneous variables is a key characteristic of experimental research.

Types of Validity

External validity refers to the degree to which results can be generalized beyond the limited research setting.
Internal validity is also a crucial aspect of research validity.

Sampling Methods

Simple random sampling and systematic sampling are two methods used to select samples.
Random sampling is the ideal approach in survey research.

Data Analysis Tools

Dr. Lean Analytical Tools include:
- Five whys for identifying problems
- Histograms for data visualization
- Statistical process control (SPC) for monitoring and controlling processes

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Description

Learn how to ensure the validity of web-based research by comparing results with traditional methods and more. This quiz covers the importance of validity in research and how to achieve it.