past issues

Welcome to NRICH.

• 2 Mean, median, mode
• 3 Article: Cricket ratings
• 3 Motivate project: League tables
• 4 What is pure mathematics? What is statistics?
• 4 Averages puzzles
• 4 Histogram vs bar graph
• 4 Class Widths confusion
• 4 Mean & Standard Deviation
• 4 Standard deviation
• 4 How accurately should you quote the mean?
• 5 Statistical term "weighted"
• 5 Median and mode of a discrete random variable
• 5 Outliers - definition?
• 5 I don't understand Null Hypothesis
• 5 Goodness of fit and hypothesis testing
• 5 Comparing random variables project
• 6 Binomial and Bernoulli random variables
• 5 Using Normal Distribution tables
• 5 Chi squared distribution
• 5 Difference of two independent Poisson Distributions
• 5 Please explain correlation coefficient formula
• 5 Regression lines
• 5 Unbiased Estimator
• 5 Central limit Theorem and unbiased estimators
• 5 Moving Averages
• 6 Portfolio insurance (finance)