SME_8e_Ch_10_Section_3 - CHAPTER 10 SECTION 3 INTRODUCTION...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 CHAPTER 10 SECTION 3: INTRODUCTION TO ESTIMATION MULTIPLE CHOICE 123. Which of the following statements is false regarding the sample size needed to estimate a population mean? a. It is directly proportional to the population variance. b. It is directly proportional to the square of z α / 2 . c. It is directly proportional to the square of the maximum allowable error B. d. None of these choices. ANS: C PTS: 1 REF: SECTION 10.3 124. The sample size needed to estimate a population mean within 2 units with a 95% confidence when the population standard deviation equals 8 is a. 61 b. 62 c. 8 d. None of these choices. ANS: B PTS: 1 REF: SECTION 10.3 125. When determining the sample size necessary for estimating the true population mean, which factor is not of our concern when sampling with replacement? a. The population size. b. The population standard deviation. c. The level of confidence desired in the estimate. d. The allowable or tolerable sampling error. ANS: A PTS: 1 REF: SECTION 10.3 126. To estimate the mean of a normal population whose standard deviation is 6, with a bound on the error of estimation equal to 1.2 and confidence level 99% requires a sample size of at least: a. 166 b. 167 c. 13 d. None of these choices. ANS: B PTS: 1 REF: SECTION 10.3 127. The sample size needed to estimate a population mean to within 10 units was found to be 68. If the population standard deviation was 50, then the confidence level used was: a. 99% b. 95% c. 90% d. None of these choices. ANS: C PTS: 1 REF: SECTION 10.3
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 128. The sample size needed to estimate a population mean to within 50 units was found to be 97. If the population standard deviation was 250, then the confidence level used was a. 99% b. 95% c. 90% d. None of these choices. ANS: B
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/28/2010 for the course FINOPMGT 250 taught by Professor Kumar during the Spring '10 term at University of Massachusetts Boston.

Page1 / 6

SME_8e_Ch_10_Section_3 - CHAPTER 10 SECTION 3 INTRODUCTION...

This preview shows document pages 1 - 3. Sign up to view the full document.

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