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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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Please help explaining how to answer so I can study for my test. The Farm Program for the Montana State Department of Agriculture needs to choose a sample of farms in order to collect information about land utilization. Montana has 56 counties and the 26,800 farms across the state are currently categorized by county. The program would like to select a random sample of at least 112 farms and record the total acreage and the acreage used for pasture and range for each farm in the sample. Two plans have been proposed: Plan A: The program will randomly select 10 counties from the 56 counties. All farms within the 10 selected counties will be visited by a surveyor who will calculate the total acreage and acreage used for pasture and range. Plan B: The program will randomly select 2 farms from each county. All 112 selected farms will be visited by a surveyor who will calculate the total acreage and acreage used for pasture and range. Which of the following best describes the sampling method for Plan A? Cluster, Simple Random, Stratified Sample or Multi Stage Sample A member of the City Council of a beachside town has proposed a resolution opposing the construction of an offshore wind farm. The council members decide they want to assess public opinion before they vote on this resolution. Below are some of the methods that are proposed to sample local residents to determine the level of public support for the resolution. Match each with one of the listed ( voluntary response, cluster, stratified, simple SRS, multistage, systematic and convenience ) -Randomly select ten city blocks; interview all the adults living in each selected block. -Have each council member survey 50 friends, neighbors, or co-workers. - Randomly pick twenty city blocks, then randomly pick 10 residents from each block. -Have the Board of Elections assign each voter a number, then select 400 unique numbers using a random number table. -Group all voters by their election district. Use a SRS to randomly select 20 voters from each election district. -Using a list of all voters in the town, randomly select a number between 1 an 50, select the voter who corresponds with this number and every 50th voter after that voter. -Place an announcement int he newspaper asking people to call their council representative to register their opinions. Council members will tally the calls they receive.

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