Standard Deviation

[Hodgeyhodgey]

I've been running through the first term's work in further and despite being quite simplistic, does anyone have a quicker method of calculating the standard deviation rather than drawing up the table as it suggests in the textbook?

I know it's easy, but I'm afraid that doing a number of these tables on sacs/exams will be quite time consuming..

[AccFur]

use your CAS calculator
go to stats lists - enter it in l1,l2 depending on how many variables you have
f4 - calc
1-var stats or 2-var stats depending on how many variables you have

and thats it! quick and easy.

that was for the TI-89, not sure about other CAS

[Hodgeyhodgey]

use your CAS calculator
go to stats lists - enter it in l1,l2 depending on how many variables you have
f4 - calc
1-var stats or 2-var stats depending on how many variables you have

and thats it! quick and easy.

that was for the TI-89, not sure about other CAS

sorry, should've mentioned i want a quicker way of doing it by hand :/

my bad, but thanks for the help! i'll remember that for when i need to do it by calculator

[Russ]

There's no fast way to calculate standard deviation by hand if all you have is a list of values. You just have to add them all up and calculate unfortunately

[lexitu]

Further Maths is a lot about accepting the ease of using the calculator and ignoring any self-pride. In most cases, such as this one, the quickest way is with the calculator.

[Greatness]

Further Maths is a lot about accepting the ease of using the calculator and ignoring any self-pride. In most cases, such as this one, the quickest way is with the calculator.

+1 You will use your CAS A LOT in further especially for the core section. The more you practice using it, the better you will get. And you will use your calculator for almost all calculations in the exam.

[Hodgeyhodgey]

Damn, guess I'm stuck using this tedious method
Although I'm having quite a bit of fun with the 68-95-99.7% rule, it's so easy!!

[sam.utute]

Further Maths is a lot about accepting the ease of using the calculator and ignoring any self-pride. In most cases, such as this one, the quickest way is with the calculator.

+1 As mentioned previously, just use your calculator. Both exams can be easily completed with no working out on your calculator.