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## INTRODUCTORY STATISTICS CH 7.1/7.2 NOTES

by: Marissa Nichol

37

0

2

# INTRODUCTORY STATISTICS CH 7.1/7.2 NOTES MATH 10041-007

Marketplace > Kent State University > Math > MATH 10041-007 > INTRODUCTORY STATISTICS CH 7 1 7 2 NOTES
Marissa Nichol
KSU
INTRODUCTORY STATISTICS
Xianglan Bai

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These notes contain information from in class notes, the book, and homework
COURSE
INTRODUCTORY STATISTICS
PROF.
Xianglan Bai
TYPE
Class Notes
PAGES
2
WORDS
KARMA
25 ?

## Popular in Math

This 2 page Class Notes was uploaded by Marissa Nichol on Thursday October 29, 2015. The Class Notes belongs to MATH 10041-007 at Kent State University taught by Xianglan Bai in Summer 2015. Since its upload, it has received 37 views. For similar materials see INTRODUCTORY STATISTICS in Math at Kent State University.

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Date Created: 10/29/15
INTRODUCTORU STATISTICS CH 7 7172 characterizes population through a numerical value sample of data represented by a numerical value also known as a statistic estimate value of an estimator 2 Examples of an estimator sampe proportion p hat symbol sample mean x with bar symbol artscience of drawing a conclusion based on infostats of a population measures the performance of a method which is bias if it s tendency is to produce untrue values 3 TYPES OF BIAS Natural bias Sampling bias amp measurement bias convenience sampling voluntary sampling non sampling sampling stat naturally bias not producing a true answer to a question Bias measured as DISTANCE between center value of estimator amp population parameter drawing people randomly from a population without replacement of sampling survey measured by precision of estimator Qualit measured using standard error of sampling distribution when small estimator is precise The size of population doesn t effect precision of estimator p hat called the sampling distribution of the sample proportion Sampling distribution relays values of p hat amp their probabilities Phat symbol sample proportion amp used to estimate population proportion

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