MKTG 3596 Lecture Notes - Lecture 2: Null Hypothesis, Xm Satellite Radio, Statistical Hypothesis Testing
Document Summary
Tentative statement about the expected relationship between two or more variables: variable. An attribute of an object or person that varies from object to object or person to person. Independent variable manipulated, measured, or selected by researcher as potential cause. Dependent variable observed and measured in response to the independent variable, effect. Population- some set of people, animals, objects, or events that in principle can be identified. Cannot always get this (b/c hard + expensive) Sample- a subset of a population identified through sampling. Infer things about population based on sample (inferential statistics) Descriptive statistics (used to summarize and describe) Inferential statistics (make interences about a population based on data from a sample) Refers to middle of the group of scores. Mean: when it is a scale variable, the data has approximately normal distribution. Median: when it is a rank-ordered variable, a scale variable has one or more outliers. Mode: when it is a nominal (categorical) variable: variability.
