Showing posts with label arithmetic mean. Show all posts
Showing posts with label arithmetic mean. Show all posts

Thursday, July 29, 2010

What does arithmetic mean?

In this section let me help you on what is arithmetic mean.
Definition for Arithmetic mean:

In mathematics and statistics, the arithmetic mean (or simply the mean) of a list of numbers is the sum of all of the list divided by the number of items in the list. If the list is a statistical population, then the mean of that population is called a population mean.

Steps to Find out the Mean:

1. Add all the numbers (on a scratch piece of paper if needed.)

2. After we have added the numbers correctly, count how many numbers there are
(for example: 2, 3, 5, 4, 1 there are 5 numbers, right.)

3. Now divide the integer of how many of the numbers you have by the sum
(For example: 20(sum) divided by 5,(how many of the numbers) the answer would by 4). This can also help us on homework now

Formulas for Arithmetic Mean

Grouped Data Arithmetic Mean Definition:
Data arising from organizing n observed values into a smaller number of disjoint groups of values, and counting the frequency of each group; often presented as a frequency table.

Formula:

Grouped Data Arithmetic Mean :
Arithmetic Mean = ΣfX / Σf
where
X = Individual score
f = Frequency