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Q: Statistics ( No Answer,   1 Comment )
Subject: Statistics
Category: Reference, Education and News > Homework Help
Asked by: nilegarritson-ga
List Price: $2.00
Posted: 23 Mar 2006 18:54 PST
Expires: 22 Apr 2006 19:54 PDT
Question ID: 711331
I'm studying for a CFA exam right now, and one of the study sessions
is about statistics.
Specifically, the use of "Table of the Student's t-Distribution for
one-tailed probabilities"
in the context of performing t-tests.  Where does this table come
from, and how is it
constructed?  The textbook says that the table in it was constructed using Excel.
There is no answer at this time.

Subject: Re: Statistics
From: freecomments-ga on 24 Mar 2006 05:05 PST
in excel, tdistribution can be found w/ function:  tdist(x, deg_freedom, tails)

the "Table of the Student's t-Distribution for one-tailed probabilities"

has to do w/hypothesis testing & defining your hypothesis.  They give
probabilities based on some assumption (this assumption is "degrees of
freedom" i.e. # of observations in your expirement).  These
probabilities define the region of rejection under which you could
reject your hypothesis & side with the alternative.

But I don't think the CFA exam will ask you TTEST question, regardless
of what your study manual is telling you.  More likely would be
questions on regression analysis & probabilities/Venn Diagrams...  NOT
hypothesis testing.


see bottom: "one sided test"

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