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, Statistics the science of conducting studies to collect, organize, summarize, analyze, and draw
conclusions from data. A numerical measurement describing some characteristic of a
sample.(statistic/sample)
Data collections of observation ( such as measurements, genders, survey, responses).
Random Variables variables whose values are determined by chance.
Descriptive Statistics consists of the collection, organization, summarization, and presentation of data.
Describing a situation.
Inferential Statistics consists of generalizing from samples to populations, performing estimations &
hypothesis tests, determining relationships among variables, & making predictions.
Probability the chance of an event occurring.
Population complete collection of all individuals( scores, people, measurements, and so on) to be
studied; the collection is complete in the sense that it includes all of the individuals to be
studied.
Sample a group of subjects or subcollection of members selected from a population. Must be
collected in appropriate way, through a process of random selection.
Hypothesis Testing a decision making process for evaluating claims about a population, based on
information obtained from samples.
Qualitative Variable Variables that can be placed into distinct categories, according to some characteristic or
attribute. (i.e. gender- male/female)(i.e. religion- catholic, Muslim, Hindu, Mormon).