Maths A Level Stats Q - please send help!Watch

Announcements
Thread starter 3 weeks ago
#1
Hi so I'm trying to do my maths and I've come across the most random question and I'm honestly stumped as to what it is asking. If anyone can help it would be greatly appreciated!

1. On planet cube circles look very different to here. A local cuboid tells you that the area (A) of any circle equals 17r^3 where r is the hypotenuese. Astounded at this idea you collect some data to test it. What coding would you apply to A and r? If the cuboid is right, what would the gradient of the coded values you plot be?

2. You are told that on the same planet, house prices P are related only to the number of square windows (S) and have the relationship P=k40^S for some constant k. You get some prices from the local estate agent to test this. What coding would you use and what would be the gradient of the coded values you plot?

3. On planet cube you collect data on the mass (M) of squarrels and the number of vertices on their head (V). You code this using the coding y=log M and x= logV. You find a linear regression exists between y and x and model this using y=1.5x+0.06. Find an equation describing the relationship between M and V. Next day you hope to be the first human to see a squarell with 7 vertices. What do you expect its mass to be?
0
3 weeks ago
#2
I only attempted Q3)
For the relationship I got: logM=1.5logV+0.06
For the mass expected I got: 21.26 (3 s.f.) I also took log as log10
0
Thread starter 3 weeks ago
#3
(Original post by Chakram)
I only attempted Q3)
For the relationship I got: logM=1.5logV+0.06
For the mass expected I got: 21.26 (3 s.f.) I also took log as log10
did u get that by substituting into the regression equation? & thanks
0
3 weeks ago
#4
(Original post by User3737)
did u get that by substituting into the regression equation? & thanks
Yeah, is that the right answer?
0
Thread starter 3 weeks ago
#5
(Original post by Chakram)
Yeah, is that the right answer?
I don't have the answers sorry!
0
3 weeks ago
#6
(Original post by User3737)
I don't have the answers sorry!
Thats fine, thats a really weirdly complicated set of questions. Hope its right
0
3 weeks ago
#7
(Original post by User3737)
Hi so I'm trying to do my maths and I've come across the most random question and I'm honestly stumped as to what it is asking. If anyone can help it would be greatly appreciated!

1. On planet cube circles look very different to here. A local cuboid tells you that the area (A) of any circle equals 17r^3 where r is the hypotenuese. Astounded at this idea you collect some data to test it. What coding would you apply to A and r? If the cuboid is right, what would the gradient of the coded values you plot be?

2. You are told that on the same planet, house prices P are related only to the number of square windows (S) and have the relationship P=k40^S for some constant k. You get some prices from the local estate agent to test this. What coding would you use and what would be the gradient of the coded values you plot?

3. On planet cube you collect data on the mass (M) of squarrels and the number of vertices on their head (V). You code this using the coding y=log M and x= logV. You find a linear regression exists between y and x and model this using y=1.5x+0.06. Find an equation describing the relationship between M and V. Next day you hope to be the first human to see a squarell with 7 vertices. What do you expect its mass to be?
A lot of what's in the questions is superfluous to the mathematics, and is only there to give context/"meaning".

Take 1 for example. You're told that A=17r^3. This is clearly not a linear relationship. So, how would you code A and r, to get a linear relationship? What would you do to the equation?

Have a look in your textbook at the section on coding.
0
X

new posts Back
to top
Latest
My Feed

Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

University open days

• Bournemouth University
Midwifery Open Day at Portsmouth Campus Undergraduate
Wed, 16 Oct '19
• Teesside University
All faculties open Undergraduate
Wed, 16 Oct '19
• University of the Arts London
London College of Fashion – Cordwainers Footwear and Bags & Accessories Undergraduate
Wed, 16 Oct '19

Poll

Join the discussion

How has the start of this academic year been for you?

Loving it - gonna be a great year (115)
17.37%
It's just nice to be back! (182)
27.49%
Not great so far... (238)
35.95%
I want to drop out! (127)
19.18%