OPERATION UNDER UNUSUAL CONDITIONS (cont)

T r i g o n o m e t r i c f u n c t i o n s (cont) - TM-5-6675-322-14_195

Section III OPERATOR MAINTENANCE - TM-5-6675-322-14_197

TM-5-6675-322-14 Topographic Support System Rectifier II Section Model ADC-TSS-9 NSN:6675-01-105-5759 Manual
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TM 5-6675-322-14 Keystrokes D i s p l ay L . R . -118,290.6295 T h e y - i n t e r c e p t o f t h e l i n e. 61.1612 Slope of the line. ( 6 ) L i n e a r e s t i m a t i o n. With data accumulated in registers R.0 through R.5 a predicted value for y (denoted y) can be calculated by keying in a new value for x a n d p r e s s i ng . A predicted value for x (denoted x) can be calculated by keying in a new value for y and pressing Example: With data intact from previous example in registers R.0 through R.5 to predict demand for motor fuel for the years 1980 and 2000, key in new x values and press . To determine the year that the demand for motor fuel is expected t o p a s s 3 , 5 0 0 m i l l i o n b a r r e l s , key in 3,500 (new value for y) and press Keystroke Display 1980 2,808.6264 Predicted demand in millions of barrels for the year 1980. 2 0 0 0 4,031.8512 Predicted demand in millions of barrels for the year 2000. 35 1,991.3041 The demand is expected to pass 3 , 5 0 0 m i l l i o n b a r r e l s d u r i ng 1992. ( 7 ) C o r r e l a t i o n c o e f f i c i e n t . Both linear regression and linear estimation presume that the relationship between x and y data values can be approximated, to some degree, b y a l i n e a r f u n c t i o n ( a s t r a i g h t l i n e ) . ( c o r r e l a t i o n c o e f f i c i e n t ) can be used to determine how closely the data “fits” a straight line. The correla- tion coefficient can range from r = + 1 to r = - 1. At r = + 1, data falls exactly o n t o a s t r a i g h t l i n e w i t h p o s i t i v e s l o p e . While at r = -1, data falls exactly onto a s t r a i g h t l i n e w i t h n e g a t i v e s l o p e . A t r = 0, data cannot be approximated by a s t r a i g h t l i n e . Example: To calculate the correlation coefficient for previous example press: Keystrokes D i s p l a y 0.9931 The data very closely approximates a straight line. 3 - 7. OPERATION UNDER UNUSUAL CONDITIONS. This equipment is designed for operation only in a controlled environment. 3-34

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