Statistics

[Muhammad Talha]

Change charts and Linear Transformation are necessary???and plz explain about the 'linear transformation'.

 

[adnanj]

i also want to ask the same question.

please reply ASAP

 

[saad155]

Change charts are necessary but i dont know anything abt linear transformation

 

[Muhammad Talha]

please anybody reply as soon as possible...

 

[SAUD ASLAM]

please anybody reply as soon as possible...

Talha , as long as it is in Syllabus it is neccessary. And welcome tu XtremePapers

 

[Muhammad Talha]

THANKS Saud.
Yar linear transformation k bare mai to bata..

 

[Saad Qadir]

Dude leikin there is no question abut them in the past paers??
or is it:O

 

[Muhammad Talha]

there is no question about them in the past papers but they r in the syllabus so they r important.

 

[Muhammad Talha]

nobody know about linear transformation???

 

[adnanj]

I have just recieved from one of my friend so not sure about authenticity

Effects of Linear Transformations on Mean, Median, sd, and Variance

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Assume that Y is a linear transformation of X. Then,

Y = bX + A

What is the relationship between the mean, median, standard deviation, and variance of X and the mean, median, standard deviation, and variance of Y?

Mean of Y = b(mean of X) +A
Median of Y = b(median of X) + A
sd of Y = b(sd of X)
Variance of Y = b² (variance of X)

For example, let b = 2 and A = 3
X Y
1 5
2 7
3 9
X Y
Mean 2 (2)(2)+3 = 7
Median 2 (2)(2)+3 = 7
sd 1 (2)(1) = 2
variance 1 (2²)(1) =4