2-Sample t-test Independent Samples
Dataset: Cloud Seeding Experiment
Dependent Variable: Rain-gage Depth (mm) of rainfall in cloud-seeded test area
Independent Variable: Seeded/Not seeded on that day (Seed=1 if Yes, 0 if No)
SPSS Instructions:
Enter dat
Design & Analysis of Split-Plot
Experiments (Univariate Analysis)
Elements of Split-Plot Designs
Split-Plot Experiment: Factorial design with at least 2
factors, where experimental units wrt factors differ in
size or observational points.
Whole plot: La
Overview of How To Lie With
Statistics by Darrell Huff
With additional insights
Chapter 1 - Sampling Biases
Response Bias: Tendency for people to over- or
under-state the truth
Non-response: People who complete surveys are
systematically different from
Univariate Split-Plot Analysis
2003 LPGA Data
Background Information
6 Golfers (Treated as only 6 of interest Fixed)
8 Tournaments (Treated as random sample of all
possible tournaments)
4 Rounds per tournament (fixed factor)
Daniel
Kung
Park
Webb
Ochoa
Topics in Data Management
SAS Data Step
Combining Data Sets I - SET Statement
Data available on common variables from different
sources. Multiple datasets with common variable
names, possibly different sampling/experimental units
Exam scores from studen
Golfer
Beth Daniel
Candie Kung
Grace Park
Karrie Webb
Lorena Ochoa
Se Ri Pak
Beth Daniel
Candie Kung
Grace Park
Karrie Webb
Lorena Ochoa
Se Ri Pak
Beth Daniel
Candie Kung
Grace Park
Karrie Webb
Lorena Ochoa
Se Ri Pak
Beth Daniel
Candie Kung
Grace Park
Kar
Comparison of 4 Diets
Dansinger, et al (2005). Comparison of
Atkins, Ornish, Weight Watchers and Zone
Diets for Weight Loss and Heart Disease Risk
Reduction, JAMA. 293:43-53
Setting
Started with 1010 Telephone Inquiries
763 Excluded (No interest, too bu
Repeated Measures ANOVA
Univariate Approach
Setting
a Treatments/Conditions to compare
N subjects to be included in study (each subject
will receive only one treatment)
n subjects receive trt i: an = N
t time periods of data will be obtained
Effects