class08-3-handouts

class08-3-handouts - PSTAT 120B - Probability &...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: PSTAT 120B - Probability & Statistics Class # 08-3- P-values Jarad Niemi University of California, Santa Barbara 21 May 2010 Jarad Niemi (UCSB) P-values 21 May 2010 1 / 15 Class overview Announcements Announcements Homework Homework 6 due Monday, 24 May @ 4pm in SH 5521 Wont be returned until Friday 28 May Mid-term II #6 was incorrect in the answer key, so if you have answer c and have it marked incorrect, see me. Jarad Niemi (UCSB) P-values 21 May 2010 2 / 15 Class overview Goals P-values Practical versus statistical significance Jarad Niemi (UCSB) P-values 21 May 2010 3 / 15 Review Problems In hypothesis testing, is the probability of committing an error of Type II. The power of the test, 1- is then: the probability of (a) rejecting H when H a is true (b) failing to reject H when H a is true (c) rejecting H when H a is false (d) failing to reject H when H a is false Is power an error? No Which of the above are errors? b,c Since =P(not rejecting H when H a is true) then power 1- =P(rejecting H when H a is true), so the answer is (a) Jarad Niemi (UCSB) P-values 21 May 2010 4 / 15 Review Problems If I run an 0.05-level test and fail to reject the null hypothesis which of the following is true about a 0.01-level test using the same data and hypothesis? (a) the null hypothesis will be rejected (b) the null hypothesis will not be rejected (c) not enough information As gets smaller, the rejection region gets smaller. Therefore it will be harder to reject. So (b) is the answer....
View Full Document

This note was uploaded on 01/10/2011 for the course STAT 120B taught by Professor Bennett during the Fall '09 term at UCSB.

Page1 / 15

class08-3-handouts - PSTAT 120B - Probability &...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online