ECMT1010 - Revision Questions (2 Viewers)

[yvonne_710]

question: suppose the over the past five yrs that the average price of warehouse space in sydney and melbourne was $384.50 per square metre a real estate agent believed that this figure has increased, and comissions a market reseacher to invetigate. a random sample of 42 properties( total for the two cities) was chosen and a mean of $395.65 and a standard deviation of $24.85 were obtained.


if 5 of these prices were more than $200 per square metre, what is the estimate of the proportion of prices costing more than $200 per square metre?



thanks... esp the proportion forumla, how to use it in this kinda qs?

 

[s.m.i.t.h]

anyone know how to do question 57? those type of linear regression questions?

 

[ToO LaZy ^*]

does anyone find that a lot of those confidence interval answers are slightly off from your own?...
my decimal places are always different to those in the answers..

anyone else have this problem?

 

[sarevok]

went to tig's consultation, he said forget about question 2)d and also question 7, they are no longer in the syllabus.

 

[s.m.i.t.h]

does anyone find that a lot of those confidence interval answers are slightly off from your own?...
my decimal places are always different to those in the answers..

anyone else have this problem?

me too
maybe its just a rounding off thing........

 

[s.m.i.t.h]

in quesion 33c)
how do u test whether the slope coefficient is negative?

 

[ToO LaZy ^*]

in quesion 33c)
how do u test whether the slope coefficient is negative?

yeah same.

i know that..
H0: B = 0
H1: B < 0

...NOW what??

 

[kow_dude]

yeah same.

i know that..
H0: B = 0
H1: B < 0

I thought the answer was wrong for this question. Shouldn't it be:

H0: B = 0
H1: B > 0 ?????????????

 

[Toodulu]

if you post the questions other ppl might be able to help

 

[absolution*]

does anyone find that a lot of those confidence interval answers are slightly off from your own?...
my decimal places are always different to those in the answers..

anyone else have this problem?

yeah

 

[yvonne_710]

I thought the answer was wrong for this question. Shouldn't it be:

H0: B = 0
H1: B > 0 ?????????????

i think it will be:
H0:B=0
H1:B<0
and then use test stat. which is t = (b1-B1)/ S(b1) and then u can get -0.87, isnt it?
s (b1) is the standard error which is 0.7637.. anyways this is the way Tig told us, i went to see him 2day as well.................
errrrrrrrrrrr......but still dont know how to do condtional distribution, can someone tell? the qs like 45 (b)

 

[absolution*]

conditonal probability is the probability given a ceratin circumstance. since all probability must equal one, you simply recalculate the probability based on the given factor.

 

[yvonne_710]

conditonal probability is the probability given a ceratin circumstance. since all probability must equal one, you simply recalculate the probability based on the given factor.

oh, i c..........thanks!

 

[yvonne_710]

has anyone tried 2004 sem 1 past paper question 3(b)?? how to work it out?

 

[absolution*]

If you post the question ill have a go.

 

[sarevok]

Where can I get the past paper?

 

[yvonne_710]

If you post the question ill have a go.

the question:
suppose the average charge for out-of-court work by solicitors in NSW is $200 per hour with a variance of 860. a random sample of 49 solicitors in NSW was selected.
if the population variance were not known, but you knew that 1% of solicitors charge less than $193 what would be the value of the population variance?

 

[yvonne_710]

Where can I get the past paper?

i think u just go to the uni library website, on the website u can find the past paper, its obvious. and then download them..

 

[kow_dude]

Where can I get the past paper?

http://www.library.usyd.edu.au/exams/economics.html

 

[sarevok]

thanks kow_dude

i would have thought for that question you would have solved for...193-200/o/(sqrt 49) = -2.33