| Author | Comment |
ballerboyz
Probe
Posted: 25 Jan 2006
20:35 GMT
Total Posts: 6 | my ti 89 os 2.09 and hw 2.00
std dev and variance results are not correct as they should be and answers are off by anywhere from 5 to 15 and even more sometimes why should it not give me correct answer?
how can i solve problem ?
thanks |
Lunchbox
Carrier
Posted: 25 Jan 2006
21:52 GMT
Total Posts: 2007 | I don't know. You can make a program/function to calculate them yourself. Variance(σ2)μ where μ is the sample mean (x with a bar over it usually signifies this, i know, but they didn't have an html character for that that I could find), x represents an individual statistic, and n is the number of statistics is:
(Σ(μ - xi)2) / n
Standard deviation is the √(Variance). |
ballerboyz
Probe
Posted: 25 Jan 2006
22:06 GMT
Total Posts: 6 | but why should it be like that maybe others are like that
can anyone plz make the function i can't program
why should it not work? |
Lunchbox
Carrier
Posted: 26 Jan 2006
17:56 GMT
Total Posts: 2007 | Try resetting all your settings to factory default and then try again. |