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STT 231 Exam 3 Questions and Correct Answers with Rationales (2026/2027)

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This document contains questions and verified answers for STT 231 Exam 3 . It includes detailed explanations, revision-focused content, and exam preparation material suitable for 2026/2027 students.

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STT 231 Exam 3

ANOVA - ANS-evaluating the method of or more businesses

better in shape of model to facts - ANS-s/sy towards 0

among organization df - ANS-ok - 1

chi squarecenter - ANS-df

chi sq.Goodness of in shape - ANS-1 specific variable follows proposed distribution

chi squareintependence take a look at - ANS-2 express variables

chi sq.Take a look at stat - ANS-(obs - exp)2 / exp

correlation among x and y - ANS-r

df - ANS-(rows-1)(columns-1)

envisioned regression version - ANS-

expected count - ANS-row total x column overall / desk general

explanatory variable - ANS-x

F statistic - ANS-among group variability/within institution variability

first condition of ANOVA - ANS-observations are unbiased

first condition of hypothesis test - ANS-10 successes/screw ups

H0 of independence check - ANS-variables are unbiased

HA of independence check - ANS-variables are associated

if fee is contained in c language - ANS-be given null, p-val more than significance degree

if price NOT contained in c program languageperiod - ANS-reject null, p-val smaller than
significance level

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