What is a good estimate?

Some of my student asked me how good is an estimate and how do we measure it up. Let us first consider the difference between an estimate and estimator. We are all familiar with the following [...]

2013 A-level H2 Mathematics (9740) Paper 2 Question 9 Suggested Solutions

All solutions here are SUGGESTED. Mr. Teng will hold no liability for any errors. Comments are entirely personal opinions. 9 (i) From the graphing calculator, unbiased estimate of population mean [...]