Statitics
What is statistics?
A branch of mathematics focused on collecting, analyzing, and interpreting data
Data?
Characteristics or information collected through observation.
The second distinction of data is . . .
Quantitative and qualitative data.
Discrete data can take on only certain values.
The number of possible values is . . .
The number of possible values is countable.
Why is statistics important?
Used virtually everywhere from government to sports to business
To be a more informed citizen
To make decisions, or it can be used to critique the statistics you see in the media
Example of data?
Measurements, survey responses, or ratings.
Quantitative or numerical data consists . . .
Quantitative or numerical data consists of numbers that represent counts or measurements.
Continuous data can take on any number within a range; the number of possible values is . . .
Continuous data can take on any number within a range; the number of possible values is . . .
What will you take away from statistics?
You will be able to:
i. Summarize data
ii. Use probabilities to make decisions
iii. Gamble effectively
iv. Standardize complex datasets v. Predict the future
Population?
The entire collection of all the subjects of interest.
Qualitative or categorical data consists . . .
Qualitative or categorical data consists of names or labels.
Consider data of age.
Discrete or Continuous Data?
When we measure age in years, we can treat it as discrete, even though (technically) age is continuous
Descriptive statistics?
Methods for organizing and summarizing information
Sample?
A sub-collection of a population.
A parameter is some measurement of . . .
A parameter is some measurement of a population.
The height of children.
Discrete or Continuous Data?
Continuous Data
Inferential statistics?
Methods for drawing conclusions about a population based on information from a sample
Give example of population and sample!
Population - Advertisements for IT jobs in the Netherlands
Sample - The top 50 search results for advertisements for IT jobs in the Netherlands on May 1, 2020
A statistic is some measurement of . . .
A statistic is some measurement of a sample.
Give an example of: Discrete and Continuous Data
Discrete Data:
The number of students in a class.
Continuous Data:
The speed of cars.