The members of a population have been numbered 1-1000. A sample of size 50 is to be taken from the population,using stratified random sampling with the proportional allocation. The strata are of sizes 400, 200, 300, and 100, wherestratum #1 consists of the members of the population numbered 1-400, stratum #2 consists of the members of thepopulation numbered 401-600, and so forth. Determine the sample sizes that will be taken from the strata.StratumSample size#1#2#3#4(Simplify your answers.)

In stratified random sampling, the population is divided into non-overlapping groups or strata. A…

Answered: The members of a population have been…

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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A manufacturer cloth dealer asked the manufacturer to send four different types of cloths as sample to place the order after checking the quality of the cloths. The company has 1800 meters of cotton cloth, 1000 meters of Polyester cloth, 1400 meters of silk cloth and 600 meters of Rayon cloth. If the manufacturer send a total of 288 meters cloth, which of the following samples he can send to the dealer as samples by using stratified sampling method? a. Cotton – 84 meters , Polyester 60 meters, Silk – 36 meters and Rayon –108 Meters b. Cotton –60 meters , Polyester 36 meters, Silk – 108 meters and Rayon – 84 Meters c. Cotton – 108 meters , Polyester 84 meters, Silk – 60 meters and Rayon –36 Meters d. Cotton – 108 meters , Polyester 60 meters, Silk –84 meters and Rayon – 36 Meters
Suppose that Fairfax County has N=400,000 households. Further, assume that for we have a complete list of these households that contains information for each household that includes estimated household income, household zip code, household address, high school related to the address. We want to collect information from either a sample of n=2000 or conduct a census of all 400,000 by using one of the techniques described below: A = Simple Random Sampling B = Stratified Sampling C = Cluster Sampling D = Systematic Sampling E = Census F = Experimental Design For each scenario below, determine which of the above techniques most closely resembles the data collection strategy being considered. For each scenario you can just designate the technique by using the appropriate letter from above. No further work need to be shown. Using household income, we sort the list from lowest to highest household income and label these sorted households as 1 to 400,000 on our list. We generate a…
Three randomly selected households are surveyed. The numbers of people in the households are 2, 4, and 9.Assume that samples of size n=2 are randomly selected with replacement from the population of 2, 4, and 9.Listed below are the nine different samples. Complete parts (a) through (c). 2,2 2,4 2,9 4,2 4,4 4,9 9,2 9,4 9,9 a. Find the median of each of the nine samples, then summarize the sampling distribution of the medians in the format of a table representing the probability distribution of the distinct median values. Sample Median Probability ▼ 4 3 2 ? ▼ 3 4 6 ? ▼ 4 6 8 ? ▼ 8.5 5.5 11 ? ▼ 6.5 13 10 ? ▼ 13.5 18 9 ? (Type integers or fractions. Use ascending order of the sample medians.) b. Compare the population median to the mean of the sample medians. Choose the correct answer below. A. The population median…
A sample of 300 items was selected. compute the p-value
Three randomly selected children are surveyed. The ages of the children are 3, 5, and 10. Assume that samples of size n= 2 are randomly selected with replacement from the population of 3, 5, and 10. Listed below are the nine different samples. Complete parts (a) through (d). 3,3 3,5 3,10 5,3 5,5 5,10 10,3 10,5 10,10 . a. For the population, find the proportion of odd numbers. The proportion is (Round to three decimal places as needed) b. Find the proportion of odd numbers of each of the nine samples, then summarize the sampling distribution of the medians in the format of a table representing the probability distribution of the distinct proportion values ce! Sample Proportion Probability Tool (Type integers or simplified fractions.) c. Find the mean of the sampling distribution of the sample proportion of odd numbers. The mean is (Round to three decimal places as needed ) Next Activane
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Three randomly selected children are surveyed. The ages of the children are 1, 4, and 10. Assume that samples of size n = 2 are randomly selected with replacement from the population of 1, 4, and 10. Listed below are the nine different samples. Complete parts (a) through (d). 1,1 1,4 1,10 4,1 4,4 4,10 10,1 10,4 10,10 14 (Round to three decimal places as needed.) b. Find the variance of each of the nine samples, then summarize the sampling distribution of the variances in the format of a table representing the probability distribution of the distinct variance values. 0 4.5 18 40.5 Probability 1 320 NONS 9 2 9 2 9 (Type integers or simplified fractions.) c. Find the mean of the sampling distribution of the sample variance. (Round to three decimal places as needed.)
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