During the recent recovery from the Great Recession of 2007-2009, the economic s

Question

During the recent recovery from the Great Recession of 2007-2009, the economic situation for many families has improved. However, in 2011 the recovery was slow and it was uncertain as to how much had really changed on the national level. To estimate the population parameter of the percent of low- income working families, a representative simple random sample could be used to calculate a point estimate and a confidence interval. Write an appropriate sampling procedure that will enable a researcher to collect a simple random sample of size n=20 from the full list of jurisdictions. Carry out a sampling of the jurisdictions by using a random number generator, random number table, or the sampling capabilities of technology to select a simple random sample of size n = 20 from the full list of the jurisdictions. Provide the selected sample of 20 in the table included below, making sure to include the corresponding percent of low-income working families (%LIWF) information for each jurisdiction selected. Use technology to calculate the sample mean and sample standard deviation of the percent of low-income working families for the selected 20 jurisdictions in your sample. Provide your mean and standard deviation and express in

Explanation / Answer

7. and 8. For a sampling procedure of choosing 20 sized sample from a population, we generate random numbers corresponding to each observation and choose the first 20 random numbers in increasing or decreasing order to get a random sample of size 20.

9. Let LIW denote % of low income working families

avg = mean(liw)

std = sqrt(var(liw))

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