Anybody good at maths lol

[Mr. Anderson]

Wouldn't weighting it make more sense?

i.e. for average % male,
Total number of men = (population of liverpool * 0.484) + (pop. of manchester * 0.488) + (pop. of leeds * 0.487)
% men for the cities combined = 100 * Total number of men / (pop of liverpool + pop of manchester + pop of leeds)

% is a %

To do it accurately you need the total population of each city and perform a weighted average calculation.

Not for a percentage.

2 of these people are correct, 2 are not.

 

[Mr. Anderson]

I admit defeat rofl.

 

[digipeep]

Liverpool, Manchester, Leeds.

Divide them by 3 and you get London every time.

 

[Mr. Anderson]

I think you mean add them together

 

[whitecrook]

You need to know the populations to work this out, you know, actual numbers 'n' stuff.

 

[ennogs]

ok I have added more stats

1) Say you have 3 cities Liverpool, Manchester and Leeds.

Liverpool has 247, 817 residents with a male population of 48.4% and a female poulation of 51.6%. Denisty of person per hectare 30 average household size 2.09

Manchester has 8,000,645 residents with a male population of 48.8% and a female poulation of 51.2% densisty of person per hectare 4.2 average household size 2.38

Leeds has 52,041,916 residents with a male population of 48.7% and a female population of 51.3% denisty of person per hectare 3.45 average household size 2.36

What formula would you use to work out that average % of the 3 male populations?


2)Also what formula would you use to calculate % difference between the 48.4%, 48.8% and 48.7% male percentages?

So I am trying to work out from the data there is only a ?% difference between the male poulations of Liverpool, Manchester and Leeds.


Apart from the questions I asked what else does this data tell you( I know the amount of residents is way of the real amount of residents for each city)?

 

[ennogs]

Originally Posted by JonJ678
Wouldn't weighting it make more sense?

i.e. for average % male,
Total number of men = (population of liverpool * 0.484) + (pop. of manchester * 0.488) + (pop. of leeds * 0.487)
% men for the cities combined = 100 * Total number of men / (pop of liverpool + pop of manchester + pop of leeds)

Quote:
Originally Posted by Mr. Anderson
% is a %

Quote:
Originally Posted by Darg
To do it accurately you need the total population of each city and perform a weighted average calculation.

Quote:
Originally Posted by WalesOwl
Not for a percentage.

2 of these people are correct, 2 are not.

So who is correct and who is not lol

2 of these people are correct, 2 are not.

So who is correct and who is not lol

 

[ennogs]

2 of these people are correct, 2 are not.

To calculate what A is as a percentage of B, follow the formula:

(A / B) x 100

So if A was 10 and B was 20:

(10/20) x 100 = 50%

------------------------------

So 48.4 / 48.8 x 100 = 99.18...%

or

48.8 / 48.4 x 100 = 100.83...%

So there is a difference of 0.83%

I must be thick lol I don't undertand why you are not using the 3rd percentage of 48.7% in the equation?

 

[Antelopethy]

Leeds has 52,041,916 residents

 

[Gaidin109]

Unfortuately as funny as this thread is, I find it strange that everyone has enough time to give numerous answers to a single simple maths question, and argue about it.

 

[Nitefly]

I must be thick lol I don't undertand why you are not using the 3rd percentage of 48.7% in the equation?

Because you can only work out one figure as a percentage of another, not two.

It's difficult to establish what you actually want.

 

[ennogs]

ok I know the amount is resedints per city is way out but just go with it lol

 

[dante6491]

There is a standard deviation of 0.5374848835% from the mean.

 

[ennogs]

Because you can only work out one figure as a percentage of another, not two.

It's difficult to establish what you actually want.

Maybe what I am trying to work out is wrong?


Liverpool has a male population of 48.4%

Manchester has a male population of 48.8%

Leeds has a male population of 48.7%


the difference in % between liverpool and manchester is 0.4% the difierence between manchester and leeds is 0.3% and the difference between liverpool and leeds is 0.3%

What I am trying to work out is the average difference in % (0.something%) between all 3 cities (or would that be a rubbish thing to work out?)

 

[V4NT0M]

lol

 

[Nitefly]

What I am trying to work out is the average difference in % (0.something%) between all 3 cities (or would that be a rubbish thing to work out?)

It is a fairly useless thing to figure out as it doesn't help you clarify anything.