**What is how Data values are arranged? The mean, which is also known as the normal mean, of a given numerical collection of data is just the sum of all the data values arranged in the proper manner. This is known as the arithmetic mean. The normal mean is a very important concept in statistical analysis and is used in all kinds of statistical studies.**

For example, take the following example. Assume we have two sets of data values: A and B. The mean of the data values A and B is always the same; however, the range of sample sizes in which the data was drawn is varying. This means that when we sum the data from the smallest sample size to the largest sample size, we will get a value that is the standard deviation of that interval. In simple terms, this is what is known as the deviation.

Now assume that we take one more set of data values: C. The deviation of this set of data values from the mean (the arithmetic mean) is plotted on a graph with a y-axis. This shows the deviation as a function of time. We can plot the deviation as a function of the mean for any interval of time t ranging from one to infinity. This is known as the bimodal distribution.

If we plot the data values on the x-axis and denote the middle value by a lower case e, then we have what is called the mean-interval-median plot, or the bimodal distribution with the mean being equal to the median of the corresponding interval on the y axis. The plot of the deviation from the mean or average gives us the deviation of the mean. Now we have a definition of what is meant by “what is how data values are arranged in a spreadsheet” and how they are measured.

Let’s assume that we have a person’s height as one of our data values. We measure this using one of two ways. Either we can take the height of the person and divide it by their weight to get the mean weight for them, or we can average their heights over their height and divide that average by their weight to get the mean height for them. If we do the latter, we have our mean age which is given by the formula: mean height / mean weight.

Obviously, there is an inherent problem with the first method. That problem is that if you average more than one person, you must average their heights, which could make it very hard to determine their heights by any standard. So we must use another means to assign our data values to these people so that we can be assured that our mean age will be correct no matter who we are comparing it to.

Here is one way we can use to do this. We measure the height of one person by their weight and then compare that person’s mean height with their actual mean height and their actual weight. We can use this to our advantage, because when we come to the list l1 of our data values, we know that each person’s mean height is exactly what they should be, and that each person’s mean weight is exactly what their mean weight should be. The problem comes in when we want to list the data we have. If we had two lists, one of which had a height and mean weight listed separately, then it would be very difficult to determine the list l1 which should actually come first.

If we list the data values as they are, in standard deviation form, then the standard deviation is going to calculate the standard error for each measurement. When we then take the difference between our list l1 and the mean of all our measurements, we get our new list l2, and we know what should occur in between each measurement. Therefore, when we make a decision as to which data set to use as our reference in calculating our normal average, or our probability calculation, we know exactly what we are dealing with.