PAD 5701 Summer 2015
Homework 3 100 points
Part I
10 pts each Use Excel
1. Using sheet 75 ,examine the sample of 234 respondents in a NASA survey on attitudes
of employees towards a variety of human resource management issues. Run
descriptive statistics o

Statistical Inference
Point and Interval Estimation
Hypothesis Testing
Objectives
Sampling Distributions and Central Limit
Theorem
Hypothesis Testing
Point and Interval Estimation of the Mean
( known and unknown)
Interpretation of the Confidence Inter

Measures of Dispersion
This lecture
Discusses measures of dispersion
Discusses the normal distribution, frequency
distributions and graphic displays
Measures of dispersion are the
second family of descriptive stats
Minimum, maximum, and range
Variance

3. Sheet 52 shows the 97-99 average effective tax rate for 34 urban municipalities in New
Jersey. What does the histogram and frequency distribution tell you?
Bin
2.232
2.914
3.596
4.278
4.96
More
Frequen
cy
1
10
12
8
1
2
The Histogram tells us that the m

Probability
The Normal Distribution
What You Will Learn
How probability relates to statistics
Characteristics of the normal curve
(i.e., bell-shaped)
How to compute z scores
How to interpret z scores
How to interpret the area under the
normal curve
Releva

Normal Distribution
Z scores
Objectives
Introduce the Normal Distribution
Properties of the Standard Normal
Distribution
Introduce the Central Limit Theorem
Use Normal Distribution in an inferential
fashion
Theoretical Distribution
Empirical distributions

Sampling
History-1936,1948
Populations,frames and samples
Non probability sampling
Probability sampling
Sample designs
Sampling theory
Practical considerations in sample design
History
The preelection polls of 1936 and 1948
The polls today
Why sample?
Def

PAD 5701 Summer 2015
Homework 5 100 points
I recommend you use Excel Standardize and NormSDist functions.
1. You have data on average birth weights in populations of industrialized nations provided
by the World Health Organization. The mean of this variab

Part I
Danielle Boudreaux, Andrea Davis, Jimmy Pastrano
PAD 5701 Summer 2015 Homework 4 100 points
6.16) The Fowler, California, Dept. of Emergency Service is concerned about whether response times to
911 calls are within what the chief regards as an acce

PAD 5701 Summer 2015 Homework 4 100 points
Part I
Do problems 16, 17 and 18 on the handout. These correspond to p. 121 of the Meier, Brudney
and Bohte text (MBB). Do these in SPSS. Use Descriptives and Frequencies. You can also
do these in Excel if you wi

PAD 5701 Frequency
Distributions
Frequency Distributions
Frequency Distributions
Proportions and Percentages
Percentage Distributions
Comparisons
The Construction of Frequency Distributions
Frequency Distributions for Nominal Variables
Frequency Distrib

Frequency Distributions
Frequency Distributions
Proportions and Percentages
Percentage Distributions
Comparisons
The Construction of Frequency Distributions
Frequency Distributions for Nominal Variables
Frequency Distributions for Ordinal Variables
Fre

Descriptive Statistics
This section introduction
Distinguishes univariate from bivariate analysis
Descriptive statistics are easy and constitute a
lot of what analysts use.
Univariate vs. Bivariate Analysis
Descriptive statistics provide summary
informa

PAD 5701 Summer 2015 Homework 2 (100 points)
Use Excel and the spreadsheet data pubpoldata on the course web site to do the following:
Section I
Using the procedures for calculating number of bins (class intervals),bin width and bin numbers,
create freque

Andrea Davis
PAD 5701 Summer 2015 Homework 1 100 points
In each case please identify what you think are the most important threats to internal and
external validity
in each case. You may wish to argue whether external validity is more
important than inter

Homework 4
Problem 6.17
Statistics
6.17c
N
Valid
250
Mean
445.94
Median
415.00
Mode
415
Std. Deviation
161.083
Minimum
139
Maximum
1345
The range between trip reimbursements is something that the manager should look at more in
depth. The average trip reim

PAD 5701 Summer 2015 Homework 6
100 points
Part 1
1. Go to the web site http:/www.pollingreport.com . Find polling results on an issue that
interest you most. Calculate 90,95 and 99 percent confidence intervals. Make a decision
on how to handle the non re