The image of mean is represented below

To compute for mean, two essential parameters are needed and these parameters are Set of data and Corresponding frequencies accordingly.

The formula for calculating mean:

Mean = ∑fx / ∑f

Where;

∑fx = Summation of the product of the data and its corresponding frequency.

∑f = Summation of the frequencies

Let’s solve an example;

Find the mean when the set of data is 12 and the corresponding frequencies accordingly is 2.

This implies that;

x | f | (fx) | fx |
---|---|---|---|

12 | 2 | (12 x 2) | 24 |

∑fx = 24

∑f = 2

Mean = ∑fx / ∑f

Mean = 24 / 2

Mean = 12

Therefore, the **mean **is **12.**

Nickzom Calculator – **The Calculator Encyclopedia** is capable of calculating the mean.

To get the answer and workings of the mean using the **Nickzom Calculator – The Calculator Encyclopedia. **First, you need to obtain the app.

You can get this app via any of these means:

**Web** – https://www.nickzom.org/calculator-plus

To get access to the **professional **version via web, you need to **register** and **subscribe **to have utter access to all functionalities.

You can also try the **demo **version via https://www.nickzom.org/calculator

**Android (Paid)** – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator

**Android (Free)** – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator

**Apple (Paid)** – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8

Once, you have obtained the calculator encyclopedia app, proceed to the **Calculator Map, **then click on **Materials and Metallurgical **under **Engineering****.**

Now, Click on **Polymer**** **under **Materials and Metallurgical**

Now, Click on **Number Average Molecular Weight **under **Polymer**

The screenshot below displays the page or activity to enter your values, to get the answer for the number average molecular weight according to the respective parameter which is the **Set of data and Corresponding frequencies accordingly.**

Now, enter the values appropriately and accordingly for the parameters as required by the **Set of data **is **12 **and **Corresponding frequencies accordingly **is **2.**

Finally, Click on Calculate

As you can see from the screenshot above, **Nickzom Calculator**– The Calculator Encyclopedia solves for the number average molecular weight and presents the formula, workings and steps too.