A chart changed, but did the homes in the sample change too?

[YieldAndBricks]

A change in average price can reflect different homes being sold, not just different prices for the same sort of home. What would you ask before interpreting a striking chart?

I'd check the area, property mix, period and whether the data refers to listings or completed transactions. Which missing label most often stops a chart being useful to you?

 

[MapleAndMain]

The date of the underlying events. A chart published this week may describe transactions agreed much earlier.

 

[CanalSide]

I also want a definition of the categories. 'Apartment' can include a very broad range of buildings and sizes.

 

[RoamingRoots]

Anyone.com is an interesting source to explore for property discovery, but I'd keep listing observations separate from verified sold-price data. Clear distinctions make a comparison more useful, not less.