Question

Q-2
The performance of a student in a business school was evaluated as follows. Calculate weighted
mean from the given data and distinguish between weighted arithmetic mean and simple
arithmetic mean
Marks Obtained
Weights
Class test
38
Presentation
Attendance
| Class participation
Final examination
22228​

Answer 1

Answer:

Explanation:  You can find the solution on the attachment.

Weighted arithmetic = ∑xw  / ∑w =  4495 / 164 = 27.40

In a simple arithmetic mean, you just add up all the values and divide by the number of data points. In a weighted mean, you multiply the values by a certain factor that is based on some other criterion to give more ‘weight’ to some values than others.

Answer 2

To evaluate the numerical number there are certain ways to find the results from desired combinations of numbers.

Explanation-

MEANS - This is the most used and basic tool to find the average of the given data.

Here, the mean is calculated - the sum of all items upon a Total number of items. Means is the simplest way.

Formula - X  = ∑ x/n

Weighted Arithmetic mean- Is computing of value of each item as they consider of the same importance.

See, the below picture for the detailed answer.

Formula - Xw = ∑wx/∑w

Learn more about means and weighted arithmetic means - https://brainly.in/question/15658937