Exam (elaborations)
BIOSTATS - EXAM 1 QUESTIONS AND ANSWERS
- Course
- Institution
BIOSTATS - EXAM 1 QUESTIONS AND ANSWERS
[Show more]
Content preview
BIOSTATS - EXAM 1 QUESTIONS AND ANSWERSWhat is descriptive statistics?
Describes data that we collect or observe
(i.e. empirical data)
Concerned with presentation, organization and summarization of data
Descriptive Statistics - Examples (3)
Frequencies and associated percentages
Average or range of outcomes
Pie charts, bar graphs, or other visual representation of data
What is Inferential Statistics?
A range of procedures/statistical tests
(e.g. t-test, analysis of variance, or chi-square test, multiple regression analysis)
Allows us to generalize from our sample of data to a larger group of subjects
(Draw a sample from a population, not dealing with the entire population)
Inferential Statistics - Examples
- Can be Parametric vs. Non-parametric statistics
Population: parameter mean, standard deviation
Sample: statistics (mean; standard deviation)
...are examples of (differential/inferential) statistics
,What is a Discrete Variable?
Examples?
characterized by gaps or interruptions
"qualitative data"
Discrete variables have values that can only assume whole numbers
What is a Continuous Variable?
Examples?
Continuous variable has no gaps or interruptions
Takes any value within a defined range
"quantitative data"
Discrete data chart
Continuous data chart
, Ex: Is numbers of patients discrete or continuous?
discrete
Ex: Is Gender discrete or continuous?
discrete
Ex: Is temperature of fever discrete or continuous?
continuous
Ex: Is mortality status discrete or continuous?
discrete
Dependent variable
The outcome factor;
the variable that may change in response to manipulations of the independent
variable.
Independent Variable
The experimental factor that is manipulated;
the variable whose effect is being studied
Can be manipulated to change the outcome
Nominal scale
Named categories with no implied order among the categories
Attributes are only named; weakest
Ordinal Scale
Named categories with order.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller GEEKA. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now