32 Questions
What is changeover in manufacturing?
The time from stopping production of one product to starting production of another
What is the primary focus of reducing batch sizes?
To reduce waste and increase efficiency
What is the main purpose of quick changeovers?
To minimize downtime between productions
Why is reducing changeover time important?
To increase production efficiency and reduce waste
What happens during a changeover?
A machine is converted to produce a different product
What is the result of reducing batch sizes and quick changeovers?
Improved production efficiency and reduced waste
What is the primary goal of implementing batch size reduction and quick changeovers?
To increase production efficiency and reduce waste
What is external validity related to in a research setting?
The degree to which results can be generalized beyond the research setting
What is the primary concern of external validity?
To what extent the results can be generalized to other settings
Why is external validity important in research?
To enable the generalization of findings to other settings
What does external validity measure?
The generalizability of the results beyond the research setting
What is the significance of external validity in research?
To enable the generalization of findings to other settings
What is a common limitation in some studies?
Omission of a no-treatment control group
What is a key aspect of experimental research?
Controlling extraneous variables
Why might a study comparing two therapies be limited?
It lacks a control group with no treatment
What is the primary goal of controlling extraneous variables?
To ensure the results are due to the manipulated variable
What can be a consequence of not controlling extraneous variables?
The results may be influenced by extraneous factors
What is the purpose of check sheets?
To organize data
What is the characteristic of a check sheet?
It is a simple handwritten document
What is the benefit of using a check sheet?
It allows for quick and easy data organization
What is the description of a check sheet?
Simple 'chicken scratches' to organize data
What is the nature of a check sheet?
It is a simple and easy-to-use tool
What is the ideal sampling method in survey research?
Random sampling
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
What is the primary advantage of using random sampling in survey research?
It helps to minimize bias and ensure representativeness
What is the main characteristic of simple random sampling?
It is a type of probability sampling that randomly selects elements from the population
What is the purpose of using sampling methods in survey research?
To make inferences about a population based on a sample
What is one of the analytical tools used to identify problems?
Histograms
What is the purpose of statistical process control (SPC) in Lean Analytics?
To monitor and control the production process
What is the technique called 'five whys' used for in Lean Analytics?
To identify the root cause of a problem
What is the primary focus of the Lean Analytical tools?
To reduce waste and improve efficiency
What is the benefit of using these analytical tools in Lean Analytics?
To identify and solve problems
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
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.
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