You are planning a sample survey that involves selecting 11 of the 100 counties
ID: 3300983 • Letter: Y
Question
You are planning a sample survey that involves selecting 11 of the 100 counties in North Carolina. Your sample will be a stratified sample consisting of the 6 most populous counties in the state and 5counties randomly selected from the remaining 94 counties.
Obtain your stratified sample from the US Census Bureau North Carolina county populations in this Excel file.
The Excel worksheet has an alphabetical listing of all 100 North Carolina counties in column A and population estimates for July 1, 2011 and July 1, 2012 in columns D and E, respectively.
We will use the population values for July 1, 2012 in column E. To simplify the selection of the 11 counties, we will order the counties according to their July 1, 2012 populations.
Order the counties by July 1, 2012 population as follows:
Excel 2003
highlight the cell range A5:E105
in the Excel menu bar click on "Data"; in the drop-down menu click "Sort"
near the bottom of the Sort dialogue box click the radio button next to "Header row"
in the first "Sort by" window choose "2012" and make sure that the "Ascending" radio button is selected
click OK
Excel 2010 and Excel 2007
highlight the cell range A5:E105
Click the "Home" tab at the upper left of the Excel window
at the far right of the menu ribbon click on the "Sort and Filter" icon
In the drop-down menu click on "Custom Sort..."
In the upper right-hand corner of the Sort window make sure the box next to "My data has headers" has a check mark; if it does not have a check mark, click in the box to make a check mark appear.
In the Sort window, under Column, sort by "2012"
In the Sort window, under Sort On, choose "values"
In the Sort window, under Order, choose "A to Z"
Click OK
The counties should now be listed in increasing order according to their July 1, 2012 populations. Tyrell County should be listed first (in row 6) with July 1, 2012 population 4,338.
Question 1. Scroll down to the bottom of the worksheet to see the most populous counties. List below the 6 most populous counties and their populations. List the most populous county first and use commas in your population answers.
EXCEL:
http://www.webassign.net/userimages/USCensus%202012%20NC%20counties.xls?db=v4net&id=244612
1. (most populous)
County; population
2.
County; population
3.
County; population
4.
County; population
5.
County; population
6. (6th most populous)
County; population
Question 2. You would now like to select a random sample of 5 counties from the remaining 94 counties in rows 6 through 99 of the spreadsheet. To select the counties use this random digits table and use the row numbers 06 through 99 in the Excel spreadsheet as the number assigned to each county. Enter the table of random digits at line 131 and select the random sample of 5counties using the consecutive pairs of digits 05 00 71, and so on, as you proceed from left to right in line 131. List the counties and their populations (use commas in your population answers) in the order in which they are selected using the random number table.
Table: http://www.webassign.net/userimages/IPS_random_digits_tableB.pdf?db=v4net&id=52708
1.
County; population
2.
County; population
3.
County; population
4.
County; population
5.
County; population
Explanation / Answer
1. The most populus counties are given below:
2. From the given random digits table, the two digit numbers on line 131 are 05, 00, 71, 66,32, 81, and 19. We will not be able to use 05 and 00 as we begin on 06. Thus, counties number 71, 66, 32, 81, and 19 are
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.