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Things to Know and Formulas for Exam - Statistics Design | STAT 402, Exams of Statistics

Iowa State University (ISU)Statistics

Material Type: Exam; Class: STAT DESIGN&EXPERMT; Subject: STATISTICS; University: Iowa State University; Term: Unknown 1989;

Typology: Exams

Pre 2010

Uploaded on 09/02/2009

koofers-user-f4a 🇺🇸

10 documents

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Download Things to Know and Formulas for Exam - Statistics Design | STAT 402 and more Exams Statistics in PDF only on Docsity! Things to know and formulas for Exam 1 • Three decisions. • Three sources of variability. • Three types of variability. • Control, Replication and Randomization. • How to use the sample size tables. • How to interpret computer output. Two Independent Sample Problem Equal Variance Condition s2p = (n1−1)s21+(n2−1)s22 n1+n2−2 with df = n1 + n2 − 2 ( Y 1 − Y 2 ) ± t∗ √ √ √ √s2p ( 1 n1 + 1 n2 ) t = ( Y 1 − Y 2 ) √ s2p ( 1 n1 + 1 n2 ) Analysis of Variance, 1-Factor with k levels Source df Sums of Squares Mean Square F Model k–1 k ∑ i=1 ni(Y i+ − Y ++)2 SSModel/dfModel MSModelMSError Error N–k k ∑ i=1 (ni − 1)s2i SSError/dfError C. Total N–1 ∑∑ (Yij − Y ++)2 1

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