Pages
Archives

Recent Posts
Categories
 5number summary 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 Cryptography 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
Monthly Archives: March 2011
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