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A management officer of Alley Condominium wants to estimate the number of children its residents have. The condominium has three towers. Due to time constraints, the officer plans to take a random sample of 60 residents. Table 4 shows the summary statistics of the collected data. Table 4: Summary statistics Tower A

A management officer of Alley Condominium wants to estimate the number of children its residents have. The condominium has three towers. Due to time constraints, the officer plans to take a random sample of 60 residents. Table 4 shows the summary statistics of the collected data. Table 4: Summary statistics Tower A

MATLAB: An Introduction with Applications
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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QUESTION 3 A management officer of Alley Condominium wants to estimate the number of children its residents have. The condominium has three towers. Due to time constraints, the officer plans to take a random sample of 60 residents. Table 4 shows the summary statistics of the collected data. Table 4: Summary statistics Tower A в Total residents 100 80 110 Sampled residents 20 15 25 Mean 35 30 40 Variance 4.6 4 5.2 a) Estimate the total number of children in the Alley Condominium. Hence, find a 99% confidence interval of the total number of children in the Alley Condominium. b) If the officer is dissatisfied with the first-time results, recommend the appropriate sample size to perform the survey again if the number of observations for each stratum is equal. It is assumed that a bound on the error of estimation is less than 100. Hence, identify the stratum sample size for each tower.
Transcribed Image Text:QUESTION 3 A management officer of Alley Condominium wants to estimate the number of children its residents have. The condominium has three towers. Due to time constraints, the officer plans to take a random sample of 60 residents. Table 4 shows the summary statistics of the collected data. Table 4: Summary statistics Tower A в Total residents 100 80 110 Sampled residents 20 15 25 Mean 35 30 40 Variance 4.6 4 5.2 a) Estimate the total number of children in the Alley Condominium. Hence, find a 99% confidence interval of the total number of children in the Alley Condominium. b) If the officer is dissatisfied with the first-time results, recommend the appropriate sample size to perform the survey again if the number of observations for each stratum is equal. It is assumed that a bound on the error of estimation is less than 100. Hence, identify the stratum sample size for each tower.
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