15 questions, 1 point each, 15 points total.
Multiple-choice: Choose the one best answer.
Use the following information to answer questions 14.
A large manufacturing company reported the following statistics regarding its
employee workforce for the past y
Suppose that the amount of time of an MU student spent studying last week
averaged 20 hours with a standard deviation of 6 hours. Let ! represent the
average amount of time spent studying last week for a sample of n = 36 students.
Note that !
*
1.
What is
n order to estimate the average price of a single-family home in a certain market,
a realtor selected a sample and used it to create a confidence interval for the
population mean. The resulting interval (in thousands of dollars) was:
!
!
!
144 to 156 thou
Of fans who attended a college football game this past weekend, 60% are male,
10% are students, 8% are male and are students, 90% rooted for the home
team, and 25% are season ticket holders. You may assume rooting for the
home team is independent of being
University of Missouri
Mizzou Online
136 Clark Hall, Columbia, Missouri 65211-4200
Telephone: 1-800-609-3727 or 573-882-2491
Fax: 573-882-6808
E-Mail: selfpaced@missouri.edu
http:/online.missouri.edu
Andrea Catherine Davis
STAT 1200 Introductory Statistic
University of Missouri
Mizzou Online
136 Clark Hall, Columbia, Missouri 65211-4200
Telephone: 1-800-609-3727 or 573-882-2491
Fax: 573-882-6808
E-Mail: selfpaced@missouri.edu
http:/online.missouri.edu
Andrea Catherine Davis
STAT 1200 Introductory Statistic
University of Missouri
Mizzou Online
136 Clark Hall, Columbia, Missouri 65211-4200
Telephone: 1-800-609-3727 or 573-882-2491
Fax: 573-882-6808
E-Mail: selfpaced@missouri.edu
http:/online.missouri.edu
Andrea Catherine Davis
STAT 1200 Introductory Statistic
University of Missouri
Mizzou Online
136 Clark Hall, Columbia, Missouri 65211-4200
Telephone: 1-800-609-3727 or 573-882-2491
Fax: 573-882-6808
E-Mail: selfpaced@missouri.edu
http:/online.missouri.edu
Andrea Catherine Davis
STAT 1200 Introductory Statistic
Solutions to Chapter 23 Workbook Problems
(Solutions are provided for those Chapter 23 problems that were assigned as part of the suggested homework. Other
Chapter 23 workbook problems were worked during lecture.)
WB23-4.
1. H 0 :
2.
3.
4.
5.
.05
x 0
z=
SOLUTIONS TO WORKBOOK EXAMPLES FOR RECITATION #1
Chapter 1 Examples
WB1-1. Define the following terms:
(a) Population The collection of all units (items, subjects, people) that are potentially of
interest to the researcher.
(b) Sample The part of the popu
Thursday Lecture
09/12/2014
Representative Sample
Small but reliable
Simple Random Sample: a sample collected in such a way that every
conceivable group of units of the correct size has an equal chance of being
the one selected
Begin with a frame (popul
Chapter 14
10/31/2014
Relative Frequency Probability Assessment: probability an event
happens is proportion of time that it happens over long run
Must be repeatable and independent
Personal Probability Assessment: subjective probability assessment
based