i need some help

What mean do you mean? 

You add all the numbers together, then divide the total by the amount of numbers.

For example:

Find the mean of 4, 5, 6, 9

1. Add all the numbers together:

   4+5+6+9=24

2. Count the numbers

    There are 4 numbers.

3. Divide the total by the amount of numbers ( divide the answer of Step 1 by Step 2 )

   24/4=6

   Therefore the mean of 4, 5, 6, 9 is 6.

Maximum's the largest

Minimum's the smallest

Mode is the one you see the most

Median's the number you see in the middle

Range is the maximum subtract the minimum

And mean is all the numbers added up, then divided by the amount of numbers there are.