Christian Lawson-Perfect
Member of the e-learning unit in Newcastle University's School of Mathematics and Statistics.
Lead developer of Numbas.
I'm happy to answer any questions - email me.
Christian's activity
Christian Lawson-Perfect on Factorial: x!/y! 10 years, 4 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Factorial: x!/y! 10 years, 4 months ago
Saved a checkpoint:
Fixed it so the first fraction always has a bigger numerator, and the second one always has a bigger denominator.Wrote some advice.
Christian Lawson-Perfect on Factorial: x! 10 years, 4 months ago
Saved a checkpoint:
Added a comment about using a calculator to the advice.
Christian Lawson-Perfect on Factorial: x! 10 years, 4 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Factorial: x! 10 years, 4 months ago
Saved a checkpoint:
Wrote some advice. Made the parts gapfills.
Christian Lawson-Perfect on Confidence Intervals 10 years, 4 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Confidence Interval 10 years, 4 months ago
Saved a checkpoint:
Wrote a description.
Christian Lawson-Perfect on Confidence Interval 10 years, 4 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Confidence Interval 10 years, 4 months ago
Saved a checkpoint:
Wrote some advice, changed the notation for confidence intervals.
Christian Lawson-Perfect on Confidence Interval 10 years, 4 months ago
Saved a checkpoint:
Rewrote the variables, trying to restore sanity.The confidence interval for Friday was just made up, so it disagreed with the given data.Now we pick population means and ranges for Monday and Friday, then generate data from those, and finally calculate the sample statistics. Fortunately, around 50% of the time the confidence intervals overlap.Still need to write advice, and proofread the question text.