ECMT1010 - Revision Questions (2 Viewers)

[stazi]

haha... u made the same mistake as i did. You forgot the 'n' in you standard dev formula

did u use n-1 as its a sample

 

[stazi]

do we need to know Correlation? the formula looks horrible.............~~~~~~~~~

its just
E(XY)-E(X)E(Y)
-------------
Stdev(X)Stdev(Y)

 

[yvonne_710]

its just
E(XY)-E(X)E(Y)
-------------
Stdev(X)Stdev(Y)

what about Geometric mean rate of return??? i cant understand the example,...

 

[stazi]

what about Geometric mean rate of return??? i cant understand the example,...

Geometric mean: (X1*X2*X3*....Xn)^1/n

Gemoretric mean rate of return:
[(1+R1)*(1+R2)*...(1+Rn)]^1/n -1

 

[yvonne_710]

Geometric mean: (X1*X2*X3*....Xn)^1/n

Gemoretric mean rate of return:
[(1+R1)*(1+R2)*...(1+Rn)]^1/n -1

thanks ............................ :uhhuh:

 

[Appar]

how do u do q 57 b) with only the 2 standard errors. in the book, u are given more info.

 

[stazi]

how do u do q 57 b) with only the 2 standard errors. in the book, u are given more info.

You don't need more info.
All you need is b0 b1 and the Sb1

 

[Appar]

could u put the working out for 57b)Find the 95% confidence interval for the mean value of improvement when the typist had 10 years experience?

 

[stazi]

could u put the working out for 57b)Find the 95% confidence interval for the mean value of improvement when the typist had 10 years experience?

not in the syllabus anymore.