ECMT1010 - Revision Questions (2 Viewers)

[absolution*]

In the "Resources" section on Blackboard there are a whole bunch of revision questions. Post problems here.

 

[yvonne_710]

Problem

i started my ecmt revision questions, and i cant do Q4, can someone tell me how to start to do it, i only need to know how to do (a)..(maybe its a bit silly to ask this question), but whatever, can u guys just tell me? thanks!

 

[kow_dude]

Use Z = (X - u)/sigma

 

[ressul]

Q2

Well, what are 6.897 and 1.242 for in the question 2?

 

[sarevok]

^^ Yes, I would also like to know that. Anyone?

 

[absolution*]

Yes if someone could provide working for qu.2, that would be appreciated.

 

[kow_dude]

I dont know why there's "6.897 and 1.242". I didn't even use those figures

 

[s.m.i.t.h]

how do u do question 7?
thanks

 

[yvonne_710]

can i ask, how to calculate marginal distribution and coniditional distribution?thanks~!!!!!!!!

 

[sarevok]

Yes, how to do 7?

 

[s.m.i.t.h]

i also need help on question 18 how do we find the mean and standard deviation form the info theyve given us

 

[absolution*]

can i ask, how to calculate marginal distribution and coniditional distribution?thanks~!!!!!!!!

so many questions, so few answers. id also like to know this^^^^^^^^

 

[kow_dude]

can i ask, how to calculate marginal distribution and coniditional distribution?thanks~!!!!!!!!

Say for question 11, to find the marginal distribution of X, you just add the columns in the table and that gives you the marginal distribution of X. The same thing goes for conditional distribution.

 

[kow_dude]

i also need help on question 18 how do we find the mean and standard deviation form the info theyve given us

Use the sample mean and sample standard deviation formula. The given information is enough for you to work them out.

 

[s.m.i.t.h]

for the mean is it sigmaX/25
but what about the standard deviaton what do u do with sigma x(squared)?

 

[kow_dude]

See attachment

 

[sarevok]

for question 2, the 6.897 and 1.242 are the standard errors.

 

[s.m.i.t.h]

See attachment

thanks dude

 

[s.m.i.t.h]

also..how to find the standard deviation in question 25 a uniform distribution?

 

[kow_dude]

I don't know how to do question 25 yet.