Pages
Archives

Recent Posts
Categories
 5number summary
 689599.7 Rule
 Alternative Hypothesis
 American roulette
 Bar Graph
 Benford's Law
 Bill Gates
 Binomial Coefficient
 Binomial distribution
 Binomial Experiment
 Birthday Problem
 Blaise Pascal
 Chevalier de Mere
 Chisquare goodness of fit
 Chisquare statistic
 Chisquare test
 Completely Randomized Experimental Design
 Conditional distribution
 Confidence Interval
 Confounding
 Correlation
 Critical Value
 Descriptive statistics
 Diabetes
 DoortoBalloon Time
 Double blind
 Empirical Rule
 Expected value
 Experiments
 First Quartile
 Gambling
 Games of chance
 Games of dice
 Histogram
 Interquartile Range
 Introduction to statistics
 Introductory statistics
 Joint distribution
 LeastSquares Regression
 Lurking variables
 Marginal distribution
 Matched Pairs ttest
 Mean
 Median
 Normal Curve
 Normal Distribution
 Null Hypothesis
 Observational studies
 OneSample tProcedures
 OneSample ttest
 pvalue
 Paul Allen
 Percentile
 Placebo
 Probability
 Randomized Experiments
 Reasoning of Statistical Inference
 Regression Line
 Residual Plot
 Residuals
 Resistant numerical summary
 Sampling Distribution
 Scatterplot
 Standard Deviation
 Statistical Inference
 Statistics In Action
 Stemplot
 ttest
 Tests of Significance
 The law of large numbers
 Third Quartile
 Time Plot
 Twoway tables
 Uniform Distribution
 Warren Buffet
Tag Archives: Randomized Experiments
Learning from bad experiments
Thinking about bad experiments is a good device helping reinforce the concepts of experimental design. No one should deliberately perform an experiment with a defective design. However, thinking about such designs is a great learning device. For example, why does … Continue reading
Posted in Observational Studies, Randomized Experiments, Statistical studies, Statistics
Tagged Completely Randomized Experimental Design, Confounding, Double blind, Experiments, Introduction to statistics, Introductory statistics, Lurking variables, Observational studies, Placebo, Randomized Experiments
Leave a comment
Thinking about study designs
When learning the designs of research studies, an effective exercise is to look at examples drawn from actual research studies. In this post, we present a series of eight research studies. For each study, the exercise is to classify each … Continue reading
Design of Observational Studies
There are numerous ways to collect data when conducting research. The study design depends greatly on the nature of the research question. There are two key areas of statistics that provide ways of collecting data, namely the idea of sampling … Continue reading
Design of experiments
When the goal in a statistical study is to understand cause and effect, experiments are the only way to obtain convincing evidence for causation. This is an introductory discussion on experimental design, introducing its vocabulary, its characteristics and its principles. … Continue reading
Posted in Randomized Experiments, Statistical studies, Statistics
Tagged Completely Randomized Experimental Design, Confounding, Correlation, Double blind, Experiments, Introduction to statistics, Introductory statistics, Lurking variables, Observational studies, Placebo, Randomized Experiments
2 Comments
Is type 2 diabetes preventable in high risk population?
Diabetes adversely affects many major organs, including heart, blood vessels, nerves, eyes and kidneys. The complications related to these organs develop gradually, but they can eventually be disabling or even life threatening. Treatment of diabetes can prevent some of these … Continue reading
A Landmark Lipitor Study of Patients with Type 2 Diabetes
People with diabetes are at high risk for heart disease and stroke. Since elevated lipid levels are associated with cardiovascular vascular disease, keeping blood cholesterol close to the recommended target numbers can lower the risk. The American Diabetes Association has … Continue reading