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OCR MEI S1 Standard Deviation

yoomi

Hey,

Does the standard Deviation equation given in the formula book ? because I could not find it !

Thanx

Reply 1

HapaxOromenon2

Original post by yoomi

Hey,

Does the standard Deviation equation given in the formula book ? because I could not find it !

Thanx

You're right: it is not included, and thus you have to memorise it (or use your calculator's standard deviation function if it has one).

Reply 2

yoomi

Original post by HapaxOromenon2

You're right: it is not included, and thus you have to memorise it (or use your calculator's standard deviation function if it has one).

Ok thank u so much

Reply 3

kevvvvvv

how do you use the standard deviation function on a calculator @HapaxOromenon2 , i have the casio fx991es plus

Reply 4

HapaxOromenon2

Original post by kevvvvvv

how do you use the standard deviation function on a calculator @HapaxOromenon2 , i have the casio fx991es plus

See
https://www.youtube.com/watch?v=0M3dBRQtNH8

Reply 5

the bear

make sure you give s_x if they ask for standard deviation or sample standard deviation. if they ask for root mean square deviation ( rmsd ) then give σ_x instead.

Reply 6

begbie68

Original post by the bear

make sure you give s_x if they ask for standard deviation or sample standard deviation. if they ask for root mean square deviation ( rmsd ) then give σ_x instead.

why? what's the difference?