Theory revision 2

• population
• it is a collection of possible individuals, objects or measurement of interest
• example: population of Australia.
• sample
• it is a portion or part of the population of interest
• example: 30 of UTS students
• parameter
• it is a measurable characteristic of a population
• example: total population of Melbourne
• statistic
• it is a measurable characteristic of a sample.
• example: 15 of wine lovers
• statistical inference
• it is the process of drawing conclusion from data subject to random variation such as observational errors and sample variation.
• example: 15 percent of beer lovers