The sum of several numbers divided by their count nicely summarizes the overall size of the numbers involved in a single value.

learn more… | top users | synonyms

-1
votes
1answer
196 views

Applying fuzzy logic to determine the degree to which a project is complete

I have a Project made up of tasks. Each task has an estimated completion percentage. I realise I could treat each tasks completion percentage as a representation of the degree of membership to the ...
-1
votes
1answer
2k views

Can weighted average be used to calculate percentage increase? [duplicate]

Possible Duplicate: Is this a weighted average/percentage problem? Let's say a Marketing company has a total turnover of 10000 \$ There are 3 salesmen A,B,C with the following turnovers: ...
-2
votes
2answers
19 views

Calculate occurance of a digit in average [closed]

Scenario: We have an average of say $1.25$ from a total of $20$ numbers. The numbers consists of $1$s and $2$s. In this case: $$2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1$$ Amount of ...
-2
votes
1answer
12 views

How to calcultate average from different weights [on hold]

I want to combine three batches of protein powder and calculate the $\%$ of protein content from the mixed batches. Batch $1$ is $38.95g$ and $48.9\%$ protein Batch $2$ is $29.25g$ and $32.09\%$ ...
-2
votes
1answer
38 views

Dropping the lowest number in a set lowers the mean average of the set.

So a friend of mine had her grade drop because her teacher had decided to drop the lowest grade. Is this possible or did the teacher mess up something? And if so, then how is it possible. We've ...
-2
votes
2answers
2k views

How to calculate MEAN of exponential distribution?

$ f(x) = \begin{cases} \frac15 e^{(-\frac15x)}, x>0 \\ 0, \text{elsewhere}\\ \end{cases}$ How to calculate $E[(X+5)]$ and $E[(X+5)^2]$ ? Thanks a lot.
-2
votes
0answers
18 views

Average dividing Average

Trying to figure this out which is the better measurement. Jul 50USD Aug 150 USD Average : 100USD Jul FX : 1.5 Aug FX : 1.7 Average : 1.6 Value at Jul : 50/1.5 = 33.33 Eur Value at Aug : 150/1.7 = ...
-3
votes
0answers
10 views

Analyze mean in difference in before and after measurements [closed]

I am trying to decide the best way to measure the realationship in the difference between the before and after measurements of a single group. So say I measure the weights of a group 6 ...
-4
votes
0answers
29 views

What is the average thickness of a Chinese book? [closed]

The thickness of a shelf and the thickness of 80 Chinese books stacked on top of each other measures 1.25m. The same shelf stacked with 40 English books stacked on top of each other measures 35cm. The ...