data
the facts & figures collected, analyzed, & summarized for presentation & interpretation
dataset
all the data collected for a particular analysis
element
the entity on which data is collected
variable
a characteristic of interest of an element
observation
the variables associated with ...
data
the facts & figures collected, analyzed, & summarized for
presentation & interpretation
dataset
all the data collected for a particular analysis
element
the entity on which data is collected
variable
a characteristic of interest of an element
observation
the variables associated with an individual element
categorical data
uses numeric or ordinal values of measurement of categories
quantitative data
use numeric (quantitative) measures
cross-sectional
data collected at a similar point in time
time series
, data collected over several time periods
panel
combination of cross-sectional and time series data
descriptive statistics
describe data or variables
population
the set of all data/variables of a statistical analysis
sample
a subset of the population
statistical inference
uses data from a sample to make estimates & test hypothesis
about the characteristics of a population
predictive analytics
uses statistical models from past data to predict the future
(forecasting) or assess the impact of one variable on another
(inference)
prescriptive analytics
uses models seeking to find a best (optimal) solution; often
these are some type of optimization model
data mining
focuses on extracting predictive information from big data
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 AcademicSuperStore. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.49. You're not tied to anything after your purchase.
