HP 12C#ABA hp 12c_solutions handbook_English_E.pdf - Page 100
Statistics, Curve Fitting
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Statistics Curve Fitting Exponential Curve Fit Using the function of the HP-12C, a least squares exponential curve fit may be easily calculated according to the equation y=AeBx. The exponential curve fitting technique is often used to determine the growth rate of a variable such as a stock's value over time, when it is suspected that the performance is non-linear. The value for B is the decimal value of the continuous growth rate. For instance, assume after keying in several end-of-month price quotes for a particular stock it is determined that the value of B is 0.10. This means that over the measured growth period the stock has experienced a 10% continuous growth rate. If B>0, you will have a growth curve. If B Examples of these are given below. The procedure is as follows: 1. Press CLEAR . 2. For each input pair of values, key in the y-value and press the corresponding x-value and press . , key in 3. After all data pairs are input, press coefficient (between ln y and x). 4. Press 1 0 above. to obtain the correlation to obtain A in the equation 99