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standard deviation

im quite unsure on standard deviation how to calculate it
https://i0.wp.com/www.clydebankmedia.com/wp-content/uploads/2017/05/fg_18.png?w=1080&ssl=1

if you replace the n - 1 with just n it is also accepted in exams.
I found videos from examsolutions very helpful with standard deviation.
Reply 3
Original post by the bear
https://i0.wp.com/www.clydebankmedia.com/wp-content/uploads/2017/05/fg_18.png?w=1080&ssl=1

if you replace the n - 1 with just n it is also accepted in exams.

thank you very much
Reply 4
Original post by the bear
https://i0.wp.com/www.clydebankmedia.com/wp-content/uploads/2017/05/fg_18.png?w=1080&ssl=1

if you replace the n - 1 with just n it is also accepted in exams.


thanks

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