Collecting Data

What is data?

• The practise of collecting and analysing data
• The factual information collected from a survey or other source 
• An element or feature that can vary
• A group chosen from a population

What is statistics?

• The science of collecting and analysing data

• Statistics collected from an entire population

• An element or feature that can vary

• A group chosen from a population

What is a population?

• A tool used to collect statistical data

• Statistics collected from an entire population

• All the people or objects on which data is collected

• A group chosen from a population

What is a sample?

• A tool used to collect statistical data

• Statistics collected from an entire population

• The factual information collected from a survey or other source

• A subgroup chosen from a population

A poll about favorite sports is taken from 100 seniors in a high school where the senior class has 575 students. 23% of respondents said that baseball was their favorite sport.
The "100" is the ______

• Sample Size
• Population Size
• Statistic
• Parameter

A poll about favorite sports is taken from 100 seniors in a high school where the senior class has 575 students. 23% of respondents said that baseball was their favorite sport.
The "575" is the ______

• Sample Size
• Population Size
• Statistic
• Parameter

What is a census?

• A tool used to collect statistical data
• Statistics collected from an entire population
• The factual information collected from a survey or other source 
• A group chosen from a population

What is a survey?

• process of collecting statistical data from a small group of a population

• Statistics collected from an entire population

• An element or feature that can vary

• A person chosen from a population

The process of collecting data by asking questions

• sample

• respondent

• clinical study

• poll

An error that comes from selecting a sample that does not represent the population

• confounding variable

• sample bias

• nonresponse bias

• placebo