Statistics 1

What is data?

• Facts, numbers, words,

• Things on a computer

• The Italian word for date

• A type of dance move

What is categorical data?

• numerical information NUMBERS

• descriptive information

  WORDS

  Categories

• numerical information WHOLE NUMBERS

• numerical information RANGE of numbers

What is numerical data?

• numerical information NUMBERS

• descriptive information

  WORDS

  Categories

Numerical data can be divided into

• Continuous numerical

• Numbers great than 100

• Categories of words

• Discrete numerical

What is a variable?

• something that is NOT measurable or observable

• something measurable or observable that is expected to change over time

• A word from algebra

• A type of question

A primary source in statistics is

• Second hand information collected from the original source by the per

• first hand information collected from the original source by the person

• Data that has been collected and summarised by someone else before we use it. 

• Data that has been collected and summarised by YOU.

Discrete numerical data

• can only take certain values (like whole numbers)

  Is counted

• can take any value (within a range)

  Is measured

• is descriptive information (it describes something). WORDS

Continuous numerical data

• can only take certain values (like whole numbers)

  Is counted

• can take any value (within a range)

  Is measured

• is descriptive information (it describes something). WORDS

A census is

• when part of the population is surveyed 

• Only 10 question that are asked

• A type of law.

• When an entire population is surveyed (whole school)

A sample is

• when part of the population is surveyed 

• Less than 10 question are asked

• An example of a product

• When an entire population is surveyed (whole school)