The videos are working fine.
The problem must be at your end and so please go to the support page – the link is above (where it says “Technical Problems”)

In the Example 7 there is coefficient of correlation provided. In order to solve the problem, we need to know formula (which in not given): corr(x,y) = cov(x,y)/(sx*sy).

Dear lecturer, please kindly advice if we need to know the relationship between correlation and covariance for exam?

The answers are at the back of the lectures notes, so say which bit of the answer you are not happy with.
(And do read the previous comment – it is most unlikely that the current examiner would ever want this.)

alinase says

can’t play the videos

John Moffat says

The videos are working fine.

The problem must be at your end and so please go to the support page – the link is above (where it says “Technical Problems”)

Olesya says

In the Example 7 there is coefficient of correlation provided. In order to solve the problem, we need to know formula (which in not given): corr(x,y) = cov(x,y)/(sx*sy).

Dear lecturer, please kindly advice if we need to know the relationship between correlation and covariance for exam?

John Moffat says

The last but one examiner did ask this once or twice, but it is very unlikely that the current examiner would want it 🙂

Muhammad says

hi, i am struggling with example 7, can you please help?

John Moffat says

The answers are at the back of the lectures notes, so say which bit of the answer you are not happy with.

(And do read the previous comment – it is most unlikely that the current examiner would ever want this.)

rmracca says

Thank you , excellent lecture:).

umair85 says

Great work there. Easy and comprehensive.

tinashe says

Nice going!

myosandaraye says

Very clear and helpful, thanks a lot

cormac says

very helpful. thank you.

sabastain says

Very Good

slobodanm says

excellent

redruby2006 says

excellent!