ECMT1010 - Revision Questions (1 Viewer)

[sarevok]

No it doesn't, the textbook says to use z tables when n>120...

 

[absolution*]

i know all the answers!

 

[yvonne_710]

true, when n>120, then use Z...my tutor told me the same thing

 

[absolution*]

what if n = 120?


lolololol

 

[stazi]

true, when n>120, then use Z...my tutor told me the same thing

sorry i meant n>120 not 130.

 

[011]

n<30: Assume normal distribution. Can use t statt
30<n<130: Use CLT. Say that t is a robust estimator
n>130: Use Z table. Use CLT.

What do you mean for 30<n<130? t has nothing to do with the CLT. Unless you mean use CLT to say its a Z, then estimate with t. But even then.... ???

 

[yvonne_710]

i know all the answers!

so for Q11 (I), whats the answer ? E(Y) is ??? can u tell though?

 

[stazi]

so for Q11 (I), whats the answer ? E(Y) is ??? can u tell though?

i got that one right

 

[stazi]

oh and i know how to conduct the hypothesis test for beta1 not equal to 0.
You shouldn't really use the p-value test.

 

[myg0t]

I know im missing something very obvious.

Can someone run me through how to do Q14.

Cheers.

 

[myg0t]

Also help with question 16...

 

[yvonne_710]

I know im missing something very obvious.

Can someone run me through how to do Q14.

Cheers.

a) 2*10 - 3*16 = -28
b) 4*10 - 12*16 + 9*40 = 208
c)9*40 - 6*306 +2100 = 624
d)3*10 - 2*16 -130 =132

 

[yvonne_710]

Also help with question 16...

30,000= P( 1+0.08)^21
and u can get P

 

[myg0t]

cheers, for some reason i was trying to use the annuity tables..

 

[myg0t]

Can you explain to me the working for Q14, i am a rook at summation notation...

 

[polska*]

questoin 2

some one just plase explain how to determine Xand Y and expalin. i dont get this

thanks heaps

 

[stazi]

some one just plase explain how to determine Xand Y and expalin. i dont get this

thanks heaps

X is the causation variable
Y is the response variable.

 

[absolution*]

can you call X the independent variable?

 

[sarevok]

Yes (10char)

 

[myg0t]

have figured out summation notation, d.w about earlier query.