All else constant, which combination of factors would decrease the width of a confidence interval most? Group of answer choices a smaller sample size and a smaller confidence level a larger sample size and a smaller confidence level a smaller sample size and a larger confidence level a larger sample size and a larger confidence level

All else constant, which combination of factors would decrease the width of a confidence interval most? Group of answer choices a smaller sample size and a smaller confidence level a larger sample size and a smaller confidence level a smaller sample size and a larger confidence level a larger sample size and a larger confidence level

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Answer all the questions
1 The width of a Confidence Interval is equal to: a The Margin of error b ½ the Margin of error c Twice the Margin of error d Not related to the Margin of error One correct answer. 2 The width of a confidence interval can be decreased by: a Decreasing the sample size b Increasing the confidence level c Increasing the sample size d Lowering the confidence level Two correct answers.
INFERENCE FOR SINGLE POPULATION PROPORTION (CONFIDENCE INTERVAL) 11. A random sample of 400 electronic components manufactured by a certain process is tested, and 30 are found to be defective. i. Let p be the proportion of defective components. Find a 95% confidence interval for p. ii. How many components must be sampled so that the 95% confidence interval will specify the proportion of defective components to within ±0.02? Source: Statistics for Engineers and Scientists, 3rd Edition, William, C. Navidi.
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