Data
Study that involves the collection, organization, description, analysis, and interpretation of data
Statistics
Variables that are typically integers representing a count of objects or abstract amounts
Discrete
Type of sample that involves a newspaper, online website, or standing at the exit of the lunchroom
Convenience sample
A value, such as a percentage, that describes a population
Parameter
When collecting data, how can you completely eliminate sampling error?
You can't!
Data in its original form
Raw Data
The type of variables used in a Likert scale:
Strongly Disagree, Disagree, Neutral, Agree, Strongly Agree
Ordinal
Type of sample that involves separating population into clusters and selecting random members from each cluster
Stratified random sample
A condition or characteristic that can take on different values
a variable
How do you transform raw data into structured data?
Organize it/make it into a table!
(or something along these lines)
Type of data representing year height
Continuous
The type of sample that is the ideal, where each member of the population has an equal likelihood of being selected
Simple random sample
__________ variables have values that describe labels or attributes.
Categorical (or qualitative)
The column names of a database are called _____.
Variables
___________ variables have magnitude, are measureable, and units with values that carry an equal weight.
Numerical (or quantitative)
You survey 50 seniors asking if they want a western theme for prom this year. Explain the difference between parameter and statistic with this example.
Parameter = % (or amount) of all seniors that want a western theme
Statistic = % (or amount) of 50 surveyed seniors who want a western theme
You survey 50 seniors asking if they want a western theme for prom this year. Explain the difference between the population and sample with this example.
Population = All seniors
Sample = 50 seniors
An attempt to make a prediction (or conclusion) based on the data we collect and analyze
Inference
A person's phone number could be classified as what type of data?
Nominal (it functions as a label)
The natural variation from sample to sample that happens by chance
Sampling error
Collecting samples that are not truly representative of our population causes ______.
Bias