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ASK THE PROFESSOR FORUM

Course Documents

Chapter 1 - Intro

Chapter 2 - Methods for Describing Sets of Data

Chapter 3 - Probability

Chapter 4 - Discrete Random Variables

Chapter 5 - Normal Random Variables

Chapter 6 - Sampling Distributions

Chapter 7 - Confidence Intervals

Chapter 8 - Tests of Hypothesis: One Sample

Chapter 9 - Confidence Intervals and Hypothesis Tests: Two Samples

Sample Exam I: Chapters 1 & 2

Sample Exam II: Chapters 3 & 4

Sample Exam III: Chapters 5 & 6

Sample Exam IV: Chapters 7 & 8

Ask the Professor Forum

Hello Professor
In the homework for section 14.4, why is number's 19 critical value negative, when it is a right tailed test?

Posted to STATS 2 on Monday, November 24, 2014   Replies: 1


Professor Mcguckian
11/24/2014
3:45 PM EST

Hi Sheyla,

This large sample approach to the Sign Test modifies the procedure we learned throughout the course in a way that requires us to always perform a left-tailed test. This is because we are choosing Smin as our test stat, and we are testing to see if that minimum value is so small that we should reject the null hypothesis. 

This is the only procedure that will require us to ignore the inequality symbol in the alternative hypothesis.

Professor McGuckian

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