p. 311, Ex. 2.
Using Talwar-Gentle with sample means as estimates of :
data: absdevPres and absdevPast
W = 11, p-value = 0.0312
alternative hypothesis: true location shift is not equal to 0
Using Talwar-Gentle with sample medians as estimates of :
data: a
STAT 518 - Section 2.1: Basic Inference
Basic Definitions
Population: The collection of all the individuals of
interest.
This collection may be _ or even _.
Sample: A collection of elements of the population.
Suppose our population consists of a finite
STAT 518 - Section 2.3: Hypothesis Testing
Often in scientific studies, the researcher presents a
specific claim about the population.
We gather data, and based on these data determine
whether or not the claim appears to be true.
Example 1: We gather ex
STAT 518 - Section 3.1: The Binomial Test
Many studies can be classified as binomial
experiments.
(1)
(2)
(3)
(4)
Characteristics of a binomial experiment
The experiment consists of a number (denoted n)
of identical trials.
There are only two possible ou
STAT 518 - Section 5.1: The Mann-Whitney Test
We now examine the situation when our data consist
of two independent samples.
Example 1: We want to compare urban versus rural
high school seniors on the basis of their test scores.
Example 2: We want to est
STAT 518 - Section 3.4: The Sign Test
The sign test, as we will typically use it, is a method for
analyzing paired data.
Examples of Paired Data:
Similar subjects are paired off and one of two
treatments is given to each subject in the pair.
or
We coul
STAT 518 - Chapter 5: Methods Based on Ranks
The rank of an observation is its position in the
ordered sample (ordered from smallest to largest).
For example, in the sample
the corresponding ranks are
Many of the methods in Chapter 5 rely on the ranks
Section 5.3: Tests about Several Variances
We have seen tests designed to compare several
populations in terms of their means.
Suppose we wish to compare two or more populations
in terms of their variances.
Note that the null hypothesis
can be written a