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통계학 개론 Chapter 1 (영문)

저작시기 2012.11 |등록일 2014.09.23 파일확장자어도비 PDF (pdf) | 8페이지 | 가격 500원

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De nition: statistics
Statistics is the science of collecting, organizing, interpreting, and
learning from data.

COURSE GOAL:
Learn how to use statistical methods to translate data into
knowledge so that we can investigate questions in an objective
manner. Here are some examples of questions we'll be able to
answer before the end of the semester:
1 How likely is it that Minnesotans will vote for Republicans?
(make predictions about an event)
2 Was this past winter signi cantly colder than past Minnesota
winters? (test hypothesis about certain characteristic)
3 What is the relationship between the amount of time spent
studying and the score received on an exam? (model
relationships)
4 How likely are you to win the lottery?(Calculate probabilities)

<중 략>

EXAMPLE 1.2:
We want to know the average height of all students at the U. It is
logistically impossible to measure everybody. Instead, we take this
class as a sample, measure our heights, and average them.
 population: all U students
 sample: this class
 parameter: average height of all U students
 statistic: average height of this class

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