This preview shows page 1. Sign up to view the full content.
Answers to selected problems of Chapter 1
1.8 a)
sample: Set of polled Floridians
Population: Set of all adult Florida residents
b)
Statistics since they are summaries of the sample.
1.10 Aspirin inference
:
a) The sample includes all the male physicians who participated in the Physicians’ Health Study.
b) The population would be all male physicians.
c) The inference is that aspirin would be more effective than placebo for
all
male physicians.
1.11 Graduating seniors’ salaries
:
a) These are descriptive statistics. They are summarizing data from a population – all
graduating
seniors at a given school.
b) These analyses summarize data on a population – all
graduating seniors at a given
school; thus, the numerical summaries are best characterized as parameters.
1.24
a)
The population is the entire UW student body of 40,858. The sample is the 100 students who were
asked to complete the questionnaire.
b)
This is the end of the preview. Sign up
to
access the rest of the document.
 Spring '08
 Staff
 Statistics

Click to edit the document details