So wood that naturally expands and contracts, creating squeaky floors. You don't even have to step on it if the temperature or humidity changes. My last house had gaps in the crawl space, so lots of shifting occurred.

Mice in the walls. It's always either mice or slightly moving plumbing pipes. I hate living near agricultural fields because mice love to try and move in every autumn.

Footsteps I'll chalk up to people hearing things. I don't know how many times I've thought I've heard footsteps but the moment I catch it, it disappears.

Low-reservoir flushing happened all the time with my last toilet. I know it had a leak but it was slow enough that I didn't much care until it started flushing once a week.

I'm not scared of my attic, I just don't like being up there because it's always hot, it smells weird, and there's too many exposed nails at face level. I imagine most people are only mildly "scared" of their basements or attics because they don't go in them very much, and fear of the unknown/unfamiliar is very real.

..... Maybe I am haunted...

Majority of Americans are superstitious morons. A majority of those will believe any study they've skimmed if it confirmed their biases

Only 1,000 people polled? We need more stats than that, before this can be called Data

Not being able to explain noises doesn't mean they think it is haunted. Most people don't know what sounds are made by pipes, the house settling, or the occasional animal that found a way into the attic or walls.

Someone said they'd seen a ghost twice in my previous house - a Victorian era labourer in a flat cap. What they didn't know was that the house was used as a base by the workers building the houses on the block it was on and the opposite block (the garden used to run all the day to the road behind as it was used as the yard for storing timber and bricks - the plot was later sold off so another house could be built on it). When we later redecorated and, stripping back to the plaster we found that the workers had painted it to make it more homely.

Disheartening.