You are a researcher studying the lifespan of a certain species of bacteria. From a previous study, it wasfound that the standard deviation was 4.2 hours. You would like to estimate the mean lifespan for thisspecies of bacteria to within a margin of error of 0.7 hours at a 99% level of confidence.What sample size should you gather to achieve a 0.7 hour margin of error? Round your z-value to 2 decimalsin your calculation.a) z =b) n (unrounded to 2 decimals, using the value from the previous part in your calculation) =c) n (rounded appropriately):bacteria

here given , population standard deviation = 4.2 hour confidence level = 99% MOE = 0.7

Answered: What sample size should you gather to…

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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Data from a representative sample were used to estimate that 33% of all computer users in a recent year had tried to get on a Wi-Fi network that was not their own in order to save money. You decide to conduct a survey to estimate this proportion for the current year. What is the required sample size if you want to estimate this proportion with a margin of error of 0.04? Calculate the required sample size first using 0.33 as a preliminary estimate of p. (Round your answer up to the nearest integer.) The sample size of _____ should be used for this study because it will guarantee a margin of error of no greater than 0.04. The other sample size computed will only guarantee a margin of error no greater than 0.04 if p < _____ or if p > ______ .
Determine the number of samples you will choose from a population of 5,200 considering that you assigned a 5% margin of error.
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 40%. You would like to be 99% confident that your estimate is within 4.5% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 85%. You would like to be 99% confident that your estimate is within 4% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 99% confident that you estimate is within 3% of the true population proportion. How large of a sample size is required?
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p=14%. You would like to be 99% confident that your estimate is within 4% of the true population proportion. How large of a sample size is required?
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In spite of the potential safety hazards, some people would like to have an Internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around 0.30. Use the given preliminary estimate to determine the sample size required to estimate this proportion with a margin of error of 0.05.
You want to obtain a sample to estimate the proportion of a population that possess a particular genetic marker. Based on previous evidence, you believe approximately P∗=15% of the population have the genetic marker. You would like to be 98% confident that your estimate is within 3% of the true population proportion. How large of a sample size is required?n =
Solve for the sample size: Determine the sample size necessary to estimate the proportion of people shopping at a supermarket in the U.S. that identify as vegan with 95% confidence, and a margin of error of 5%. Some studies estimate that approximately 6% of the U.S. population identify as vegan.

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