Welch method

The welch method is a way to take a big group of numbers and look at parts of it to get useful information. It's like if you had a really big piece of candy, and you wanted to see how sweet it was by just taking bites from different parts of it.

The welch method gets this information by splitting the group of numbers up into smaller groups and then looking at how they behave. It's like if you had a big group of your friends, and you wanted to know who was the fastest runner. Instead of having everyone run at the same time, you could have them take turns running and see who was the fastest.

Just like how you can't eat the whole piece of candy at once, you can't look at all the numbers in the group at once. That's why the welch method splits the group up. These smaller groups are called "windows".

Once you have the windows, you look at how the numbers behave in each one. You can see patterns in the behavior, like if the numbers go up and down or stay pretty steady. This tells you information about the big group of numbers.

So, to sum it up, the welch method looks at different parts of a big group of numbers to get useful information by splitting it up into smaller groups and analyzing the patterns in each one.