CASTI-89 TITANIUM · CALC89
PowerReg
Fits a power model y=a·x^b to data with least squares regression. The results are stored in stat variables such as stat.RegEqn.
Syntax
PowerReg X,Y[,Freq][,Category,Include]
- Group
- Statistics
- Arguments
- Takes the x list, the y list and optional frequency, category and include lists.
- Availability
- Included
Example
| Input | Result |
|---|---|
| PowerReg {1,2,3,4},{2,8,18,32}:stat.RegEqn | 2.0·x^2.0 |
Typing PowerReg {1,2,3,4},{2,8,18,32}:stat.RegEqn on the home screen and pressing ENTER returns 2.0·x^2.0.
Related commands
- QuadRegFits a quadratic y=a·x^2+b·x+c to data with least squares regression.
- QuartRegFits a quartic polynomial y=a·x^4+b·x^3+c·x^2+d·x+e to data with least squares regression.
- SinRegFits a sinusoidal model y=a·sin(b·x+c)+d to data.
- stDevPop(Returns the population standard deviation of a list.
- stDevSamp(Returns the sample standard deviation of a list.
- tIntervalComputes a t confidence interval for a population mean when σ is unknown.
- tInterval_2SampComputes a t confidence interval for the difference of two population means.
- tTestPerforms a one sample t test on a population mean when σ is unknown.