• We are pleased to announce that the winner of our Feedback Prize Draw for the Winter 2024-25 session and winning £150 of gift vouchers is Zhao Liang Tay. Congratulations to Zhao Liang. If you fancy winning £150 worth of gift vouchers (from a major UK store) for the Summer 2025 exam sitting for just a few minutes of your time throughout the session, please see our website at https://www.acted.co.uk/further-info.html?pat=feedback#feedback-prize for more information on how you can make sure your name is included in the draw at the end of the session.
  • Please be advised that the SP1, SP5 and SP7 X1 deadline is the 14th July and not the 17th June as first stated. Please accept out apologies for any confusion caused.

Ch-11-pg-28-past exam sum.

D

deepakraomore

Member
Ch-11-pg-28-past exam sum.

Qi) d) to compute the CI of mean difference, used the pivotal quantity of "two normal means. with unknown variance. AND
Qii) b) to compute CI of mean difference, used pivotal quantity of "paired data"

Why two diffrent methods?
And is there any rule to use such alternative?
 
Ch-11-pg-28-past exam sum.

Qi) d) to compute the CI of mean difference, used the pivotal quantity of "two normal means. with unknown variance. AND
Qii) b) to compute CI of mean difference, used pivotal quantity of "paired data"

Why two diffrent methods?
And is there any rule to use such alternative?

Both compare means - but the paired data should be used where the samples are not independent - they belong to the same individuals eg before and after situations.
 
Thanks.
Then how to identify the data whether paired or not? Is it given in the question or by checking correlation?
 
Thanks.
Then how to identify the data whether paired or not? Is it given in the question or by checking correlation?

It's usually clear from the question, eg the two samples are from the same individuals before and after a training programme...
 
How do we know in the ii part that it is paired?
On reading both the subparts appear to be the same,ie, in both the inspectors go to similar houses..
 
How do we know in the ii part that it is paired?
On reading both the subparts appear to be the same,ie, in both the inspectors go to similar houses..

It clearly says:

"sending them each to the same set of eight houses"
 
Back
Top