# What does the mathematical term range mean

Now, if we multiply a number by 5 we will get a single value from the multiplication. Likewise, we will only get a single value if we add 1 onto a number.

## Range (mathematics)

So, this equation is a function. When we square a number there will only be one possible value. We then add 1 onto this, but again, this will yield a single value.

- To find a range in Excel, you have two options;
- The Differential Calculus by John Spare mentions;
- Recall, that from the previous section this is the equation of a circle;
- Following this, the word was later used in a book on Calculus in 1865:

So, it seems like this equation is also a function. Recall, that from the previous section this is the equation of a circle. Circles are never functions. Hopefully these examples have given you a better feel for what a function actually is.

## Range of a Set of Data in Math and Statistics

We now need to move onto something called function notation. Function notation will be used heavily throughout most of the remaining chapters in this course and so it is important to understand it.

The letter in the parenthesis must match the variable used on the right side of the equal sign. If you keep that in mind you may find that dealing with function notation becomes a little easier. This is one of the more common mistakes people make when they first deal with functions.

This is just a notation used to denote functions. Next we need to talk about evaluating functions. Evaluation is really quite simple. So, when there is something other than the variable inside the parenthesis we are really asking what the value of the function is for that particular quantity.

The key here is to notice the letter that is in front of the parenthesis. In other words, we just need to make sure that the variables match up. Here are the evaluations for this part. Here are the evaluations. Now the second one.

- The term domain is most commonly used to describe the set of values for which a function map , transformation , etc;
- The interquartile range is equal to Q3 minus Q1;
- Q2 is the median value in the set.

Recall that when we first started talking about the definition of functions we stated that we were only going to deal with real numbers. In other words, we only plug in real numbers and we only want real numbers back out as answers.

- Range rule of thumb;
- Procedure for finding a standard deviation using the rule of thumb;
- Click the Input Range box and then type the location for your data;
- As if this wasn't confusing enough, Evans et al;
- The meaning of "domain" in topology is a connected open set.

For some reason students like to think of this one as multiplication and get an answer of zero. However, evaluation works in exactly the same way. Here is this evaluation. This one works exactly the same as the previous part did. We will have some simplification to do as well after the substitution. It is easy to mess up with them. Just evaluate it as if it were a number.

While we are on the subject of function evaluation we should now talk about piecewise functions. Recall the mathematical definition of absolute value.