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- GEOMETRIC PROGRESSION
- AIM
-
- This program fits a geometric curve to a set of coordinates, using the
- method of least squares. The equation, coefficient of determination,
- coefficient of correlation and standard error of the estimate are printed.
-
- EXAMPLE
-
- The data shown below gives the pressure of a gas measured at various
- volumes in an experiment. The relationship between pressure and volume of
- gas is expressed by the equation:
- K
- PV = C
-
- where P = pressure, V = volume, and C and K are constants. The formula
- can be rewritten in standard geometric form, as follows:
- -K
- P = CV
-
- Note that the exponent is negative, which accounts for the negative
- exponent when this data is calculated by the program. The problem is to
- fit a geometric curve to the data below, and to estimate the pressure of
- 90 cubic inches of the gas.
-
- VOLUME PRESSURE
- 56.1 57.0
- 60.7 51.0
- 73.2 39.2
- 88.3 30.2
- 120.1 19.6
- 187.5 10.5
-
- Note that the data may be entered from the keyboard, or from a data file
- created in the non-document mode of WordStar. The format for a data file
- is:
-
- Test Data <== Title of up to 65 characters of any kind.
- 56.1 57 <== X value 1, one or more spaces, Y value 1
- 60.7 51 <== X value 2, one or more spaces, Y value 2
- 73.2 39.2 <== .
- 88.3 30.2 <== .
- 120.1 19.6 <== .
- 187.5 10.5 <== X value N, one or more spaces, Y value N
-
- Data for interpolation must be entered via keyboard.
-
- REFERENCE: Poole, L. and M. Borchers 1979 Some Common Basic Programs,
- 3rd ed. Osborne/McGraw-Hill, Berkeley, California.
-
- BASIC VERSION: Dr. Stanley Kaplan Nov 84
- PASCAL VERSION: Dr. Stanley Kaplan Feb 87 (Version 1.0)
- UPDATES: Feb 88 (MS-DOS Version 2.0)