Directions (please read all the directions and view the example before beginning):
Go to a website that lists used cars available for sale (I recommend usedcars.com or carmax.com).
Pick a make & model of a somewhat popular car. You’ll need to get at least 30 cars for sale after you search, so, if you don’t get that, make sure to either expand your search area or pick a different model. If you get a lot of results (such as several hundred), you can restrict your search further by limiting the years of the vehicles or using the other filters (just do NOT filter using price, mileage, or color).
Using a random number generator, pick 30 cars from this list. (See the StatCrunch tutorial for “Random Number Generator” in the Supplemental Material module group)
Data: Record the PRICE, MILEAGE, and EXTERIOR COLOR of those 30 cars you picked to include in your sample. For the exterior color variable, write similar colors the exact same way (e.g. all of the following, I would just record as “gray”: “Predawn Gray Mica,” “grey,” and “gray”). Put these results in a spreadsheet and save it as an Excel file (.xlsx or .xls), CSV file, or as a table in Word. The variable names should be at the top, each column representing a different variable. Each row should represent a different car for sale.
Using words (and possibly screenshots):
Sampling Method: Explain how you generated your sample and identify the type of sampling you did (i.e. simple random sampling, stratified, systematic, etc.).
Variables: Identify whether each variable is quantitative (numerical) or qualitative (categorical). Also include the level of measurement of each variable (nominal, ordinal, interval, or ratio). For the quantitative variables, include the units of measurement. The the qualitative (categorical) variables include the levels.
Sample & Population: Identify your experimental unit, sample, and population.
Save your write up as a Word or PDF file. I do not expect this to be in APA/MLA or other formal format nor do I expect an intro or conclusion. However, I do expect this project part to be easy to read and follow and look somewhat professional.
For full credit, you must submit #4 and #5 above (you can submit it as a single Word or PDF file, or you can upload more than one file).
If you lose points on this project part, please review feedback and resubmit with corrections for full credit.
Note: Please do not copy my example (i.e. pick a car other than 2021 Toyota Highlanders).
Project 1 Example
For this project, I gathered a sample of thirty 2021 used Toyota Highlanders available for sale listed on the usedcars.com website using the simple random sampling method. A total of 65 cars were listed. Numbering these cars 1-65, I picked 30 using the random number generator applet on StatCrunch. See image below.
After generating 30 numbers, I sorted the list to make it easier to use: 1, 3, 5, 8, 10, 16, 17, 19, 21, 22, 23, 24, 25, 38, 39, 41, 43, 44, 45, 47, 49, 50, 51, 52, 53, 56, 58, 59, 64, 65.
I’m skipping this part in the example since this would give away the answers.
Sample & Population
Experimental unit: a 2021 used Toyota Highlander listed for sale on usedcars.com.
Sample: The thirty 2021 used Toyota Highlanders listed for sale on usedcars.com that were included in the sample.
Population: All 2021 Toyota Highlanders listed for sale on usedcars.com.
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