There is a need to calculate the average value between the indicators. I want to be sure that this method is fair. When I consider others, the data is different.

There is a drain of a and in .... of such lines 4. How I do: a / b = x. Then I get my x for each line and order (x + x + x + x) / 4 = my answer. If you do (a + a + a + a) / 4 = x. (in + in + in + in) / 4 = y. x / y = my answer (only the numbers are not the same as the first time).

In fact, I just need to find - how many times A is more than B on average for a group of lines. Which of these methods is fair?

  • actions with fractions like in the third grade pass. Or now in the fourth? - Igor
  • and where is the fraction if the question and the order of calculating the average ... or, for each line, consider the ratio of a and in and then their average output .. or separately spline all but a and all in and then find the ratio of the spliced ​​results - FX_Sektor

1 answer 1

and where is the fraction

Fraction here with the fact that your first option is:

(a1/b1 + a2/b2 + a3/b3 + a4/b4) / 4 == (a1*b2*b3*b4 + a2*b1*b3*b4 + a3*b1*b2*b4 + a4*b1*b2*b3) / (b1*b2*b3*b4) / 4

and second:

 (a1 + a2 + a3 + a4) / (b1 + b2 + b3 + b4)

There is a difference?

You need the first option.

  • one
    Thank. Just on YouTube I started repeating the whole course of mathematics :) Here is the division of current fractions opened today) - FX_Sektor