Everything.
The myth of the wage gap was created by people that took a small pool of information on how much money men and women made, left out all relevant information and just averaged it out.
All that means is that THOSE people, made up THAT average. It does not represent the total population in EITHER example.
You get one man in your pool that makes 1 million a year and suddenly the average total that men makes skyrockets. Its the fucking same thing with this stupid ass survey. You can have a large portion of your pool UNDER weight and then toss in a few 500 pound fucks and make everyone sound over weight.
You are uneducated and thus easily deceived which is why so many use this simple trick so often.
https://www.physics.smu.edu/pseudo/LieStat/
"When talking about a group of values you hear of the "average" value. You might assume one thing but, on occasion, someone with an ulterior motive will use something different. The natural assumption is the arithmetic mean, which is the sum of the numbers divided by the count. There is another "average" that is sometimes used, namely the median. If you take all the values and arrange them in ascending order, then take the middle one, you have the median. It means that half of the values were lower and half were higher.
Example: Suppose you want to buy a home in a area where the average income is high (you might make some good connections among your neighbors). Your agent shows you a development in which the average income is over $1,000,000 annually. That sounds really good, so you buy. However, over time, your notice that few of your neighbors actually seem very wealthy. In fact, you can't seem to find anyone with an income over $100,000. Did the real estate agent deceive you?
Yes, in a way. It turns out that there is a tiny little cul-de-sac where 4 or 5 really highly paid executives live. They pull down $10,000,000 or more. The rest of the residents are in the $60,000 to $100,000 range. The few VERY LARGE incomes pulled the average WAY UP. You'd get a better picture of the income distribution by using the median, which might be $75,000 or so. A few large values skewing the distribution will drag the arithmetic average up but will not have much effect on the median."