We have collected information on the population of houses sold in Cedar Falls between September 2022 and March 2023 using Zillow marketplace data available here. The information doesn’t include townhomes, multi-family, condos, lots, or apartments. We have information on the sale price and features of the house (bedrooms, bathrooms, etc). This dataset is organized in the file CedarFalls_HousesSoldLast6moths.csv
Initially, we are going to load the data into RStudio
using the function read.csv as follows:
SoldHouses <- read.csv("CedarFalls_HousesSoldLast6moths.csv")
dim(SoldHouses)## [1] 185 13head(SoldHouses, 5) # to show the first 5 rows of the dataset## id price_sold_usd Bedrooms Bathrooms sold_month sold_month_text sold_date
## 1 1 425000 4 4 3 March 03/03/2023
## 2 2 170000 3 1 3 March 03/03/2023
## 3 3 295000 3 3 3 March 03/03/2023
## 4 4 443900 5 3 3 March 03/03/2023
## 5 5 865176 5 4 3 March 03/02/2023
## street_address city state zip_code Country
## 1 3623 Pheasant Dr Cedar Falls IA 50613 USA
## 2 1900 Walnut St Cedar Falls IA 50613 USA
## 3 5404 Meadowlark Ln Cedar Falls IA 50613 USA
## 4 2715 Falcon Ln Cedar Falls IA 50613 USA
## 5 5307 Fernwood Dr Cedar Falls IA 50613 USA
## Property.URL
## 1 https://www.zillow.com/homedetails/3623-Pheasant-Dr-Cedar-Falls-IA-50613/76666933_zpid/
## 2 https://www.zillow.com/homedetails/1900-Walnut-St-Cedar-Falls-IA-50613/76668231_zpid/
## 3 https://www.zillow.com/homedetails/5404-Meadowlark-Ln-Cedar-Falls-IA-50613/76671882_zpid/
## 4 https://www.zillow.com/homedetails/2715-Falcon-Ln-Cedar-Falls-IA-50613/93829357_zpid/
## 5 https://www.zillow.com/homedetails/5307-Fernwood-Dr-Cedar-Falls-IA-50613/2071239917_zpid/tail(SoldHouses, 5) # to show the last 5 rows of the dataset## id price_sold_usd Bedrooms Bathrooms sold_month sold_month_text sold_date
## 181 181 299000 3 3 9 September 09/08/2022
## 182 182 515000 6 3 9 September 09/08/2022
## 183 183 185000 4 1 9 September 09/08/2022
## 184 184 200000 4 1 9 September 09/07/2022
## 185 185 243700 3 1 9 September 09/06/2022
## street_address city state zip_code Country
## 181 1815 Grand Blvd Cedar Falls IA 50613 USA
## 182 2908 Wellington Dr Cedar Falls IA 50613 USA
## 183 532 Bonita Blvd Cedar Falls IA 50613 USA
## 184 1522 Theimer St Cedar Falls IA 50613 USA
## 185 4114 Heritage Rd Cedar Falls IA 50613 USA
## Property.URL
## 181 https://www.zillow.com/homedetails/1815-Grand-Blvd-Cedar-Falls-IA-50613/76649890_zpid/
## 182 https://www.zillow.com/homedetails/2908-Wellington-Dr-Cedar-Falls-IA-50613/76669939_zpid/
## 183 https://www.zillow.com/homedetails/532-Bonita-Blvd-Cedar-Falls-IA-50613/76670979_zpid/
## 184 https://www.zillow.com/homedetails/1522-Theimer-St-Cedar-Falls-IA-50613/76666062_zpid/
## 185 https://www.zillow.com/homedetails/4114-Heritage-Rd-Cedar-Falls-IA-50613/76671154_zpid/Now use the Shiny app below to create sampling
distributions of means of price_sold_usds from Samples of
sizes 10, 50, and 100. Use 5,000 simulations. Shiny is an
open source R package that provides an elegant and powerful
web framework for building web applications using R.
What does each observation in the sampling distribution represent?
Effect of increasing the sample size: How does the mean, standard error, and shape of the sampling distribution change as the sample size increases?
Effect of increasing the number of simulations: How (if at all) do these values change if you increase the number of simulations?
Let’s do it together!