Test1c_KEY_Sp11 - Name: _KEY_ 9 February 2011 IE330 Spring...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Name: _______________KEY________________________ 1 of 10 9 February 2011 IE330 Spring 2011 Test 1c No calculators, closed book, closed notes. Do not tear off any pages. Once you are finished, turn in the test and leave quietly.
Background image of page 1

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

View Full DocumentRight Arrow Icon
Name: _______________KEY________________________ 2 of 10 Confidence intervals 22 2 /2 /2, 1 1 1 1 11 ˆˆ (1- ) ˆ / n n nn n s n s pp x z x t s p z n Single sample tests 0 2 2 0 0 0 0 0 0 2 0 00 1 / / (1 ) nS X X X np Z T Z n s n np p Mean and variance 2 1 ii x x x xs
Background image of page 2
Name: _______________KEY________________________ 3 of 10 1 – 8 worth 6 points each, except 3, which was worth 4 points; 9 and 10 worth 28 points each 1. Suppose a 90% confidence interval on a mean is [103.5, 143.5]. Which of the following are true (choose all that are correct)? a. A 95% confidence interval would contain 103.5. b. We cannot determine the population mean from the information given. c. H0: = 140 vs. H1: ≠ 140 would be rejected at α = 0.05. d. H0: = 140 vs. H1: < 140 would be rejected at α = 0.05. e. None of the above is true. 2. (True or False) Having a higher sample standard deviation will increase the test statistic Z 0 , all else being equal. 3. Suppose we conduct a hypothesis test on a mean, and the test statistic Z 0 is found to be 2.01. For which of the following hypotheses is the conclusion correct (choose all that are correct)?
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 09/19/2011.

Page1 / 10

Test1c_KEY_Sp11 - Name: _KEY_ 9 February 2011 IE330 Spring...

This preview shows document pages 1 - 4. Sign up to view the full document.

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