Summary
Summary Stats 188 chapter 7 notes
- Institution
- Stellenbosch University (SUN)
Summary of chapter 7, covered in the second semester.
[Show more]
Content preview
CHAPTER 7 SAMPLING DISTRIBUTIONSSAMPLING DISTRIBUTIONS OF THE MEAN
The possible
>
sampling distribution of the mean is the
sampling distribution of all sample means calculated
from all possible samples of a
given size .
02
If ~
( v4.02 ) then ~ ill
,
n and 2 = 5C -
m
O
n
* since the population mean (µ ) and the mean of the
sampling distribution Of the mean are both equal ,
the sample mean (E) Is said to be an unbiased estimate of the population mean cut .
As the sample size ( ) increases the standard error ( Osi O ) of the distribution of
n
sampling
= n
,
the mean decreases
standard error of mean : Ox = o
n
> SAMPLING FROM NORMALLY DISTRIBUTED POPULATIONS :
◦
If sampling is done from a population that IS
normally distributed with mean i t and standard deviation
0
,
then regardless of the sample size
,
n
,
the sampling distribution of the mean is normally
°
distributed ,
with mean Mx = it and standard error of the mean OI = n
o
finding Z for the
sampling distribution
of the mean :
2- =
MI
Oi
=
µ
o
.
n
◦
Finding for the
sampling distribution of the mean
0
=
µ t Z n
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller juliayates19. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for R75,00. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
73918 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy summaries for 14 years now