fall07reviewsession2

fall07reviewsession2 - POLS 203 FALL 2006 PRACTICE PROBLEMS...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
POLS 203 FALL 2006 PRACTICE PROBLEMS 2 Please note that in the exam you will be asked to show all the steps in answering the question and at the end, interpret the results in a couple of sentences. 1. A random sample of n=25 from a normally distributed population with σ=7 yields a sample mean x=67.3. What is the 99% confidence interval for μ? (63.688 to 70.912) 2. We want to test the hypothesis that the mean of a population is μ=46. We draw a sample size of n = 100 and obtain a sample mean x=51. We also have the information, population variance=400.Compute the relevant test to test this hypothesis, showing all the necessary steps. At which level of significance are you able to reject H 0 ? (z=2.5, reject at .05 level, fail to reject at .01 level) 3. An auditor wants to test a company's claim that average accounts receivable could equal the $375 stated on the balance sheet. The population standard deviation is $100.00. A sample mean from 49 accounts was $400.00. (α=.05 significance level). (t=1.75, fail to reject Ho)
Background image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 2

fall07reviewsession2 - POLS 203 FALL 2006 PRACTICE PROBLEMS...

This preview shows document pages 1 - 2. Sign up to view the full document.

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