Correct interpretation of a p-value
in a null hypothesis t-test
One of the central tools used in statistical analysis is hypothesis testing with p-values. For the purposes of this
briefing, we are going to use a simple t-test of the difference in means be

Statistics and Linguistic Applications
Hale
April 22, 2008
Proportion test
In Chapter 3 of his book, Baayen reports word frequencies from celex. These are based on a corpus sample
of 18580121 tokens.
word
the
president
hare
harpsichord
frequency
1093547
2

What is a P-value?
I have found that many students are unsure about the interpretation of P-values and other
concepts related to tests of significance. These ideas are used repeatedly in various
applications so it is important that they be understood. I w

Tests of Hypotheses Using Statistics
Adam Masseyand Steven J. Miller
Mathematics Department
Brown University
Providence, RI 02912
Abstract
We present the various methods of hypothesis testing that one typically encounters in a
mathematical statistics cour

Examples
2
examples
k 1-Sample Z Test
Set Up
1. On the icon menu, select STAT2.
Execution
2. When using list data (List is selected as the Data parameter), be sure to input data into
the list first.
3. 3(TEST)b(Z)b(1-Smpl) . 1-Sample Z Test
4. Set calcula

One Proportion Z Test
p is an unknown proportion with some success as an
outcome.
statistic: a number that can be computed from sample
data.
p (p-hat) is the sample proportion, an estimate of p, the
true proportion.
# of successful outcomes in sample
p
#

Hypotheses about
One Sample Tests
Z Tests
Two-Tail Tests: With a two tail test, the error is split into two with /2
going into each tail.
EXAMPLE:
A manufacturer produces bolts with a thickness of exactly 1inch
(purportedly). A customer takes a random sa

Curso: Cambio Climtico
Objetivos del Mdulo: El clima
Este mdulo tiene por objetivos
F Conocer los conceptos fundamentales que definen el sistema climtico de la
Tierra.
F Comprender la influencia de la atmsfera, la hidrosfera, la litosfera y la biosfera
so