Week014-CourseModule-Putting-it-Together-PST_l_v16_l5l_s1.pdf

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Putting it TogetherCK-12Say Thanks to the AuthorsClick (No sign in required)
To access a customizable version of this book, as well as otherinteractive content, visitCK-12 Foundation is a non-profit organization with a mission toreduce the cost of textbook materials for the K-12 market both inthe U.S. and worldwide. Using an open-source, collaborative, andweb-based compilation model, CK-12 pioneers and promotes thecreation and distribution of high-quality, adaptive online textbooksthat can be mixed, modified and printed (i.e., the FlexBook®textbooks).Copyright © 2016 CK-12 Foundation, The names “CK-12” and “CK12” and associated logos and theterms “FlexBook®” and “FlexBook Platform®” (collectively“CK-12 Marks”) are trademarks and service marks of CK-12Foundation and are protected by federal, state, and internationallaws.Any form of reproduction of this book in any format or medium,in whole or in sections must include the referral attribution link(placed in a visible location) inaddition to the following terms.Except as otherwise noted, all CK-12 Content (including CK-12Curriculum Material) is made available to Users in accordancewith the Creative Commons Attribution-Non-Commercial 3.0Unported (CC BY-NC 3.0) License (licenses/by-nc/3.0/), as amended and updated by Creative Com-mons from time to time (the “CC License”), which is incorporatedherein by this reference.Complete terms can be found atterms-of-use.Printed: October 2, 2016AUTHORCK-12
www.ck12.orgChapter 1.Putting it TogetherCHAPTER1Putting it TogetherProfessor Reitz believes that she has more than 800of snow on her deck, if she takes the following measurementsusing a SRS, can she be 95% sure that the mean depth is greater than 800?7.9200, 8.300, 7.9800, 8.1200, 8.3100, 8.0500, 8.2700Look to the end of the lesson for the answer.Putting it TogetherBy now, you have learned all you need to know to test some real-life hypotheses. You know how to calculate themean of means,x, the sample standard deviation,σ, and how to referencezandtscores. You are familiar withconfidence intervals and confidence levels. You know when to use az-test, and when to use at-test, and you knowthe difference between a null and alternative hypothesis. If are unsure of your grasp of any of these concepts, returnto the appropriate lesson and review before moving on, otherwise, let’s put it all together!Just for reference, here are the formulas for calculating confidence intervals oftandztests:T-test confidence interval=x±tα2snZ-test confidence interval=x±za2×σnThe steps to test a single-mean hypothesis:1. Choose an appropriate test:1.Z-test ifσis known and if the population is known to be normal orn30.2.T-test isσis unknown and/orn<30.

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Term
Fall
Professor
NoProfessor
Tags
Statistics, Normal Distribution, Standard Deviation, Null hypothesis, Statistical hypothesis testing

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