On friday I have a statistics GCSE Exam and I'm bloddy nervous so I'd thought I'd start a little thread on it hoping if you lovely people can with me luck.
Also feel free to post little bits of revision notes to remember so myself and anyone who is also doing it can benefit from.
He's my essential thing to remember:
Standard deviation = sd = square root [sum( x - xbar)^2 / (N-1)]
Damn, I am sooooo nervous about it and its to bloody hard to revise!!!!