Answered: _a. A test of the effectiveness of a…

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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Transcribed Image Text:a. A test of the effectiveness of a new curriculum could begin by dividing an area by school district, then choosing a school or set number of schools at random and sampling students from each. b. At a birthday party, teams for a game are chosen by putting everyone's name into a jar, and then choosing the names at random for each team. _c. A market survey by a company interested in branching into a new market might choose a population of people using similar products, stratify it by brand, and sampling from each stratum. d. A researcher polls people as they walk by on the street. e. A survey assessing customer satisfaction with a product might establish clusters based on place of purchase, then choose a number of those clusters at random. f. A survey about timekeeping might divide the population by time zone, then take 100 random samples per zone. g. Suppose our desired sample size is n=300, and we wish to ensure that the distribution of subjects' ages in the sample is similar to that in the population. We know from census data that approximately 30% of the population are under age 20; 40% are between 20 and 49; and 30% are 50 years of age and older. We would then sample n=90 persons under age 20, n=120 between the ages of 20 and 49 and n=90 who are 50 years of age and older. h. At a bingo game, balls with every possible number are placed inside a mechanical cage. The caller

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