Pages
Archives
-
Recent Posts
Categories
- 5-number summary
- 68-95-99.7 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
- Chi-square goodness of fit
- Chi-square statistic
- Chi-square test
- Completely Randomized Experimental Design
- Conditional distribution
- Confidence Interval
- Confounding
- Correlation
- Critical Value
- Descriptive statistics
- Diabetes
- Door-to-Balloon 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
- Least-Squares Regression
- Lurking variables
- Marginal distribution
- Matched Pairs t-test
- Mean
- Median
- Normal Curve
- Normal Distribution
- Null Hypothesis
- Observational studies
- One-Sample t-Procedures
- One-Sample t-test
- p-value
- 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
- t-test
- Tests of Significance
- The law of large numbers
- Third Quartile
- Time Plot
- Two-way tables
- Uniform Distribution
- Warren Buffet
Category Archives: Observational Studies
Is there anything we can do to avoid the flu?
In many places, influenza activity peaks during the period in between December and February. What are some of the best practices to reduce the spread of the flu and to minimize the risk of catching it? The standard recommendations are: … Continue reading
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
Introductory Statistics 
Is College Worth It?
Is college worth it? This was the question posed by the authors of the report called College Majors, Unemployment and Earnings, which was produced recently by The Center on Education and the Workforce. We do not plan on giving an … Continue reading →