COMPLETE)
QMETH 201, Introduction to Statistical Methods, Section 8
B. TESTING HYPOTHESES
YO! A BIG IDEA!
Some practical problems require us to use intervals to estimate values of population parameters
common when we have little or no information about t
moDEL
COMPLETED
QMETH 201, Introduction to Statistical Methods, Section 11
Testing Hypotheses and Model Building for Regression Analyses
Testing Hypotheses now that we know about errors and sums of squares, we can test hypotheses for
regression analyses.
Co M PLETED
HOW to USE Sampling Distributions
A. INTERVAL ESTIMATION
Due to sampling (meaning, having incomplete information), values of individual sample statistics
seldom equal the value of a population parameter. As noted in the Coca Cola bottling plan
COM PLETED
QMETH 201, Introduction to Statistical Methods, Section 9
Testing Hypotheses about Differences
We now examine approaches to test hypotheses about differences between two populations or groups.
Basically, we want to compare two populations or gr
COMPLe-ra)
Cox/ammo . Y<>< KEGKESSION: Y: RX?
Regression'Analysis Regression Analysis is about explaining variation in outcomes by specifying and
testing statistical relationships among variables. In the two-variable case we usually specify Y as a
inction
fev
QMETH 201, Statistics
Studer-Ellis
Examination 1
1 May 2017
COPY S
TO RECEIVE CREDIT, PLEASE SHOW ALL RELEVANT WORK in the spaces provided
Unless instructed otherwise, please round ALL continuing decimal values to AT LEAST THREE places
Please ERASE (o
CDMPLET ED
Testing Hypotheses about Differences between Two Population Proportions
The logic for testing differences between two population proportions is similar to the logic for testing
differences between 0 ulation means. "
p p Two lTs
Stating Hypothes
QMETH 201, Exercise Set 8, Due 25 May 2017
1. A sales manager collected the following data on Years of Experience and Annual Sales (in $000s) for
10 salespersons:
Salesperson
Years of Experience
Annual Sales ($000s)
1
1
80
2
3
97
3
4
92
4
4
102
5
6
103
6
Math 308 M - Spring 2017
Midterm Exam Number Two
May 17, 2017
Name:
Student ID no. :
Signature:
Section:
1
2
3
4
5
6
7
Total
15
12
12
12
15
24
10
100
This exam consists of SEVEN problems on SIX pages, including this cover sheet.
Show all work for full c
QMETH 201, Exercise Set 8 Cover Sheet
Name: _
Section: _
1. a. Please place the scatterplot on a supporting work sheet.
b. _
c. _
_
d. _
2. a. _
_
b.
NO
YES
(please CIRCLE one)
Explain: _
_
c. _
d.
NO
YES
(please CIRCLE one)
Explain: _
_
COM PLE TED
2. Exponential Probability Distribution
Recall, the Poisson distribution is useful for modeling the arrival, or occurrence, of events. For example,
the probability that x visits to our web-site occur within the next minute. The exponential mod
COMPLETED
QMETH 201, Introduction to Statistical Methods, Section 7
[From Descriptive Statistics and Probability to] Inferential Statistics
1. WHAT: Inferential Statistics . Due to limited resources (time, money, persons, space, .), we oen
use data from a
Co M PLETED
HOW to USE Sampling Distributions
A. INTERVAL ESTIMATION
Due to sampling (meaning, having incomplete information), values of individual sample statistics
seldom equal the value of a population parameter. As noted in the Coca Cola bottling plan
COMPLETE)
QMETH 201, Introduction to Statistical Methods, Section 8
B. TESTING HYPOTHESES
YO! A BIG IDEA!
Some practical problems require us to use intervals to estimate values of population parameters
common when we have little or no information about t
ANSWER KEY - QMETH 201, Exercise Set 3, Due 12 April 2017
1. Use the grouped frequency distribution below to answer/complete Parts a through d (NOTE: the
distribution represents the number of pages in a random sample of 300 course packets):
Z^rrRVAt
OF
XN
ANSWER KEY - QMETH 201, Exercise Set 4, Due 20 April 2017
1. A real estate developer is awarding one of four prizes to customers who view new properties. The prizes
are awarded randomly through drawings. Prize values and their associated probabilities fol
ANSWER KEY - QMETH 201, Exercise Set 2, Due 6 April 2017
1. In a study of how background environments of shopping mails influence purchase behaviors, researchers
varied the presence of background music and background scents (or aromas). The researchers th
ANSWER KEY - QMETH 201, Exercise Set 1, Due 30 March 2017
1. Determine whether each example below represents cross-sectional or time series data:
a. Washington state's gross domestic output for each of the last 20 quarters. T/A1 Sfi I ^
b. The unemploymen
QMETH 201, Exercise Set 5, Due 27 April 2017
1. Suppose you receive one e-mail message every 25 minutes, on average.
a. Determine the probability you receive the next e-mail message within 10 minutes.
b. Determine the probability you receive the next e-ma
C0 M PLETED
QMETH 201, Introduction to Statistical Methods, Section 5
PROBABILITY DISTRIBUTIONS
SEE PAGE 510 A E
Recall, a random variable is an(uncertain numerical quantlty) We distinguish discrete and continuous
random variables. ' '
A. DISCRETE Random
CP^PLCTe'Q
QMETH 201, Introduction to Statistical Methods, Section 3
3. Variability - Spread or dispersion. Central tendencies are just that, tendencies. For example, a student
can have an overall GPA of 3.0 by earning all "B's" or by earning no, or some,
COMPLETED
QMETH 201, Introduction to Statistical Methods, Section 7
[From Descriptive Statistics and Probability to] Inferential Statistics
1. WHAT: Inferential Statistics . Due to limited resources (time, money, persons, space, .), we oen
use data from a
Part C
Probability COMPLETED
PLUS. MANv Fumes Cauasss Mu. Use
QMETH 201, Introduction to Statistical Methods, Section 4 PROBAM LITY IDAsj' PROBAGIUTY IDEAS
ARE A EH9 PART OF DATA Sue-Nee; C FA
Probability Basics [CHARTERED F, N ANCJ A L ANA LY S 1]
Ex Com
COM PLE TED
QMETH 201, Introduction to Statistical Methods, Section 6
B. Probability Distributions Continuous Random Variables
GENERAL INFORMATION
poHP
Let X be a continuous random variable; f(X) is the associated probability density function, which
repre
.^
Ke'
QMETH 201, Discussion Session Activity Sheet 2 cfw_. .^1
1. An aerospace company submits bids on two separate federal government defense contracts. The company
president believes there is a 0.40 probability of winning contract 1. If the company win
QMETH 201, Discussion Session Activity Sheet 1
1. Note the level of measurement for each variable below (please use nominal, ordinal, interval, and ratio):
a.the weekly closing price of one share ofAmazon.com common stock KAT "10
b. temperature (degrees F