PSYC105 Lecture Notes - Lecture 2: Ratio, Null Hypothesis, Dependent And Independent Variables

• School: Macquarie University
• Department: Psychology
• Course: PSYC105
• Professor: Alissa Beath

Document Summary

Samples and populations: populatio(cid:374): the (cid:449)ide(cid:396) g(cid:396)oup (cid:455)ou(cid:859)(cid:396)e i(cid:374)te(cid:396)ested i(cid:374) Research questions are always about populations: sample: a (representative) selection from the population, from whom you collect data. Data is collected from the sample: e. g. Population: australian children (up to 12 years of age) Parameters and statistics: parameter: a numeric summary of the population, statistic: a numeric summary of the sample, e. g. Average age of university students in australia = 20 years old -> parameter: e. g. Average age of 100 randomly selected university students = 22 years old -> statistic: usually interested in parameters but have information about statistics. Data and variables: u(cid:374)it of o(cid:271)se(cid:396)(cid:448)atio(cid:374): the le(cid:448)el of (cid:449)hi(cid:272)h (cid:455)ou(cid:859)(cid:396)e i(cid:374)te(cid:396)ested i(cid:374) sampling. Individual, school, organisation, country, etc: data: a collection of information that has been recorded from your sample set up as a spreadsheet, variable: piece of information you have collected that varies among participants. Age, height, weight, sng, atar: qualitative: descriptive.