Exam 2 Suggested Solutions

[Studyinghard]

Estimated Solutions for Modules 1,2 and 6 + Core,
Source = My memory bank

1a) 1/2
b) Median = 28
    Range = 56  
    IQR = 17
c) Just adding 6 in the 1 line for the stem plot
d) Mean and Median can be used because its approximately symmetric.

2a) $350
 b)18250
c) Explain how it is unreliable - I just said that there is no strong linear relationship so the plots will be either below or above because of this also extrapolation (predicting outside of range)
d) Just plot the points on the time series
e) Not sure but it was GDP = 20000 +524x
f) 725

Number Patterns
1a) Just subtract the terms to show d = 1.7
b) 11.3
c) Cant remember this one
d) 246.xx not sure about decimals.
e) m = 1 and k = 1.7

Cant remember all of this...

Last question to do with the signposts
a) 14.7
b) An+1 = 1.05An   A1 = 14.7

Geometry
1) 120
b) 240
c) 20m

2) Cant remember the values
a) using 0.5x40x90xsomething degrees.


3) Is this the contour question? If so.
a) 9m
b) proving was easy just tan (10/9) gives 48 degrees
c) 2.5cm (the slope question)

3) x = 1.5m

4) height = 7.75m

Matrices
a) [ 8 4 1] (I think)
b) [26]
c) total points scored



2b) 66
2c) 6
d) [50,150,100] (vertical)

3.b) -5
   c) 10 rebounds

4a) i [2100][1100] (vertical)
ii 3200

b) [2613,1613] (vertical)

c) increase

d) decrease



LOSING MY MEMORY!
cont~

[Albeno69]

Dont have the exam sheet but trying to remember as much as possible.

1a) 1/2
b) Median = 28
    Range = 56 
    IQR = 17
c) Just adding 6 in the 1 line for the stem plot
d) Mean and Median can be used because its approximately symmetric.

2a) $350

cont~

recon they will be anal bout 1/2 cos i wrote 11/22

[iwannagetA]

for the first question

11/22*100 = 50%

[whatup2010]

yeah i wrote "11/22 or 50%"...well i hope i did haha

[Studyinghard]

for the first question

11/22*100 = 50%

it asked for a proportion so id say have to be a fraction and not a percentage.

[mmmmm]

for the first question

11/22*100 = 50%

AH i did 50% :/

it asked for a proportion so id say have to be a fraction and not a percentage.

[Albeno69]

assuming proportion 11/22 will be correct or would you have to make it 1/2

[iwannagetA]

for the first question

11/22*100 = 50%

it asked for a proportion so id say have to be a fraction and not a percentage.

but they did ask for percentage i think? they did?

[Studyinghard]

assuming proportion 11/22 will be correct or would you have to make it 1/2

either would go IMO

[dennydenny]

wow good memory

[superstar1]

wats IMO

[Studyinghard]

in my opinion.

[VCE123456789]

for the questiona avout centre Mean and Median can be used because its approximately symmetric
Some people wrote that there are no outliers present so both can be used?Is  that right as well

[lingaz]

For the flying fox question in geometry and trig i got 8.5 ...?? I wasn't too sure if that was right...

[Albeno69]

for the questiona avout centre Mean and Median can be used because its approximately symmetric
Some people wrote that there are no outliers present so both can be used?Is  that right as well

yea i wrote,
both can be used as there are no outliers and provided fences