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Animal Stats Exam 1

TermDefinition
Why we typically subsample a population?
The source of data is important
We need context to understand the data
Lurking or confounding factors
Animals will respond differently to treatments based on inherent variation
When we sample a population, our results are not 100% certain. If we measured an entire population then we can be 100% certain.
The difference between population parameter and simple statistic
Identify sample statistics or population parameters
Can you evaluate the population of interest and the sampling technique to determine if extrapolation occurred?
Difference between quantitative versus qualitative data
Can you classify data that is given to you as quantitative or qualitative or come up with your own examples?
Difference between observational versus experimental studies
Can you identify an observational study or an experimental study?
Random sampling
Stratified sampling
Systematic sampling
Convenience sampling
Voluntary sampling
Undercoverage
What is the difference between descriptive and inferential statistics?
Reliability
Validity
What does bias mean?
Can you identify bias and variability when illustrated using a bull-eye and darts?
Can you identify situations in which bias and/or variability would be increased in a survey? For example, when a sensitive question is asked bias is generally increased.
Random sampling and non-sampling errors
Can you come up with examples of each? How do you reduce random sampling and non-sampling error?
Can you identify different types of non-sampling errors?
Confidence Interval definition
What is the purpose of a CI?
Can you calculate a CI
Do you understand how changing the confidence level affects the confidence interval?
Can you make a confidence statement?
Can you identify incorrect interpretations of a confidence level.
Can you identify factors that influence the confidence we have in a confidence level.
How do you decrease the range of your confidence interval?
Response variables, explanatory variables and treatment. Can you identify them in a study?
Why is a control needed
Types of controls negative, positive, comparative, sham, historical
Identification of types of control treatments in a study
Why is determining sample size an important aspect of experimental study design and what makes it challenging?
How does sample size and variability impact our ability to detect treatment differences if they exist?
Understand and be able to calculate sample size using the given formula.
Understand how changes in %d and CV% affect the required sample size formula
When treatments are randomly assigned, what does this mean?
Common experimental designs (CRD, RBD, Latin square, switchback) How are they different?
Common experimental designs (CRD, RBD, Latin square, switchback) Pros and Cons?
Common experimental designs (CRD, RBD, Latin square, switchback) Can you identify them?
Common experimental designs (CRD, RBD, Latin square, switchback) Can you suggest the best design for a particular example given?
Common experimental designs (CRD, RBD, Latin square, switchback) How should animals be assigned to treatment in each design?
Block is an explanatory variable
Washout periods – what are they and why are they important.
In what experimental design would you use a washout period?
Created by: izzy29
 

 



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