It's just two levels of formula.
You're looking for this line:
y = a + bx
Your variables are y and x. Good to this point?
a and b just represent statistics. You will calculate them using your data.
Say x has 4 entries. x1 to x4. You will have a couple of stats:
(all)x = x1 + x2 + x3 + x4
(all)x^2 = x1^2 ... + x4^2
I hope i'm not making this more confusing.
There will be some stats for y as well. And one for xy. Then you punch them in (at this point they will all be numbers) to your formula for a and for b. Then a and b will be numbers, and you will have your line / gradient.
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comment by Rex (U7889)
posted 3 minutes ago
Is there a different between regression and ordinary least squares?
----------------------------------------------------------------------
Ordinary least square technique is a type of regression model I think...
Not bad for someone who hates maths
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Comment deleted by Site Moderator
You are plotting a line yeah. You're turning data into a model. It's not the only way to turn data into a model, and it's almost always one of the worst ways, but it's a tool which will come in useful.
To create a line you need 2 unknown things. So a and b are just numbers which you calculate. As x changes, so will y.
At x = 0, y = a
At x = 10, y = a + 10b
At x = 50, y = a + 50b
Creates a straight line, with gradient b.
Terry Jenkins and Jamie Lewis both out. Looking good for Darren Webster to nick a slot late on.
---------------
I like Webster
Comment deleted by Site Moderator
Comment deleted by Site Moderator
The maths on your course will probably get harder than GCSE i'm afraid. It's a further maths A level technique we're talking about I think, albeit quite a simple one.
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Does everybody else find Wright dull or is it just MILF? I've enjoyed watching him of late
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I started enjoying Thornton in the premier league last year, he smashed Ando, drew with MVG and beat Taylor 7-4 and even though he was definitely firmly an also ran, it was entertaining.
Comment deleted by Site Moderator
Who the fack is Darren Webster?
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Thornton is a guarantee for it. He's a scot.
Comment deleted by Site Moderator
What a fun way to spend a Saturday night...
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posted on 23/11/13
It's just two levels of formula.
You're looking for this line:
y = a + bx
Your variables are y and x. Good to this point?
a and b just represent statistics. You will calculate them using your data.
Say x has 4 entries. x1 to x4. You will have a couple of stats:
(all)x = x1 + x2 + x3 + x4
(all)x^2 = x1^2 ... + x4^2
I hope i'm not making this more confusing.
There will be some stats for y as well. And one for xy. Then you punch them in (at this point they will all be numbers) to your formula for a and for b. Then a and b will be numbers, and you will have your line / gradient.
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
comment by Rex (U7889)
posted 3 minutes ago
Is there a different between regression and ordinary least squares?
----------------------------------------------------------------------
Ordinary least square technique is a type of regression model I think...
posted on 23/11/13
Not bad for someone who hates maths
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
You are plotting a line yeah. You're turning data into a model. It's not the only way to turn data into a model, and it's almost always one of the worst ways, but it's a tool which will come in useful.
posted on 23/11/13
To create a line you need 2 unknown things. So a and b are just numbers which you calculate. As x changes, so will y.
At x = 0, y = a
At x = 10, y = a + 10b
At x = 50, y = a + 50b
Creates a straight line, with gradient b.
posted on 23/11/13
Terry Jenkins and Jamie Lewis both out. Looking good for Darren Webster to nick a slot late on.
---------------
I like Webster
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
The maths on your course will probably get harder than GCSE i'm afraid. It's a further maths A level technique we're talking about I think, albeit quite a simple one.
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Does everybody else find Wright dull or is it just MILF? I've enjoyed watching him of late
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
I started enjoying Thornton in the premier league last year, he smashed Ando, drew with MVG and beat Taylor 7-4 and even though he was definitely firmly an also ran, it was entertaining.
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Who the fack is Darren Webster?
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
Thornton is a guarantee for it. He's a scot.
posted on 23/11/13
Comment deleted by Site Moderator
posted on 23/11/13
What a fun way to spend a Saturday night...
Page 10 of 81
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