2010 Census Data – Population and Sample
Objective 1 - Define and compare population and sample.
1. Use the following resources to assist in defining population and sample IN YOUR OWN WORDS.
http://www.stats.gla.ac.uk/steps/glossary/basic_definitions.html#popn
Population –
Sample –
2. Use the following website to find the 2010 Census total populations of Ohio:
http://quickfacts.census.gov/qfd/
Total Population for Ohio ______
Use the following website to find the total population for US:
http://2010.census.gov/2010census/data/index.php
Total Population for US ______
3. This is the tricky step: finding the actual data from the 2010 Census. Click the link below:
http://factfinder2.census.gov/faces/nav/jsf/pages/searchresults.xhtml?refresh=t#none
On the right side, click on either People or Housing.
· If you choose people, select either race and ethnicity or age and sex.
· If you choose race and ethnicity, select any of the choices, then Race Alone or in Combination 2010. Then select Ohio above the chart. Record the info for the first line of each race/ethnicity listed.
· If you choose age or sex, select age, then Age groups and sex 2010. Then select Ohio above the chart. Record the info for your age group, 15-19 years, and the median age at the bottom of the page.
· If you chose housing, select Basic count/estimate and then the first option (Housing Units). Record info under Tenure.
Which Topic did you choose?______
If people, which subtopic did you also choose? ______
Record your results here:
4. Identify which census tract you live in by visiting one of the two websites:
http://www2.census.gov/plmap/pl_trt/st39_Ohio/c39113_Montgomery/CT39113_004.pdf
http://2010.census.gov/2010census/popmap/
List the census tract number you live in. ______
5. Using a map on the link below, click on total population of the upper right corner of the interactive map. Then in the search bar, type in Kettering, Ohio. On the left side of the screen, select census tract. Locate your tract by the number on the right side of the information shown with the cursor and left-click on the tract you live in. Then select either race, ethnicity, sex/age or housing status (the same topic you chose for #3) and record the information from your tract.
http://2010.census.gov/2010census/popmap/
Subgroup selected ______
List info:
6. Students will draw a sketch of the tract they live in on a separate sheet of paper (labeling the streets the bound their tract), state which subset (race, ethnicity, sex/age or housing status) they chose to compare to Kettering and summarize their findings referring to sample and population. They will then comment if they think their tract is a fair representation of Kettering.
Evaluation:
A – 1) Provided accurate sketch, 2) stated the subset, 3) correctly summarized his/her results including which is the sample and population, and 4) commented on their opinions if his/her tract fairly represents Kettering.
B – Students answered 3 of the 4 parts correctly
C – Students answered 2 of the 4 parts correctly
D – Students answered 1 of the 4 parts correctly
F – Students did not do the activity or they had all incorrect answers.
Objective 2 – Determine if a sample is a fair representation of the population.
1. The total US population for 3 successive years (1840-1860) are:
1840 – 17.1 million
1850 – 23.2 million
1860 – 31.4 million
Speculate what you think the total population is for the next year based on the given information.
Total population for the next year (1870) ______
2. Given the following information:
1870 – 38.6 million
1880 – 50.2 million
1890 – 63.0 million
1900 – 78.2 million
Would you change your answer from #1? ______If so, why? ______
3. Next you will read about 3 types of sampling from a handout and identify the correct techniques given different scenarios. Write your answer on the worksheet.
4. Now you will read 3 different articles asking if sampling should be used to conduct the Census.
http://www.englishfirst.org/census/censusncppr.htm
http://www.sciencenews.org/sn_arc99/3_6_99/bob1.htm
http://www.time.com/time/nation/article/0,8599,1879667,00.html
5. Summarize the pros and cons to sampling versus “counting heads” using enumerators. Write your answers on a separate piece of paper. You can write in paragraphs, a list, bullets, or whichever method that organizes your thoughts but is also clear and legible.
6. Students will then choose which method they feel is more accurate and support their choice with a minimum of 3 reasons. Write your answer on the same piece of paper you answered #5.
Evaluation:
A – Students will 1) correctly summarize the pros and cons, 2) choose one method, 3) provides at least 3 thoughtful reasons supporting their decision
B – Correctly summarizes the pros and cons, chooses a method but provides 2 reasons supporting his/her choice.
C – Correctly summarizes the pros and cons, chooses a method but provides 1 reason supporting his/her choice OR does not correctly summarize the pros and cons, chooses a method, but provides 2 or more reasons supporting his/her choice.
D – Correctly summarizes the pros and cons, but does not complete the rest of the assignments OR does not correctly summarize the pros and cons, chooses a method but provides 1 reason supporting his/her choice
F – Does not correctly summarize the pros and cons, chooses a method but does not support their choice OR does not do the assignment