statistics, core 1, core 2 fomule 4.0 / 5 MathematicsStatistics, averages and distributionsASOCR Created by: YasminCreated on: 25-04-13 18:05 mean x = ∑x/n x = ∑xifi/∑fi 1 of 32 variance o = ∑x/n - x o=∑xifi/∑fi - x 2 of 32 standard deviation o = o 3 of 32 Binomial conditions (in context) outcome of each trial is independent of outcomes and other trials. And probability of success is contant 4 of 32 Geometric conditions (in context) outcome of each trial is independent of outcomes and other trial. And a single trial has exactly 2 possible outcomes 5 of 32 Regression x on y (x dependent, y independent) x = a'+b'y b'= sxy/syy a' = x-b'y 6 of 32 Sin(x) if +ve 180 minus answer, if -ve add 360 7 of 32 cos (x) 360 minus answer 8 of 32 tan (x) always add 180 9 of 32 trigonometry identity 1 tan Ө = sin Ө/ cos Ө 10 of 32 trigonometry identity 2 sin Ө + cos Ө = 1 11 of 32 increasing sequence diverege 12 of 32 decreasing sequence converge 13 of 32 up & down sequence osiatting 14 of 32 Intergration add one onto the power , THEN divide by new power (+k if there are no limits) 15 of 32 trapezium rule area = 1/2 x h x ((add ends) + 2x(add rest of values)) 16 of 32 UNDERestimate (when line curves down) as the top of he trapezium are under the curve 17 of 32 OVERestimate (when line curves up) as the top of the trapezium are above the curve 18 of 32 LOGaB = C a(to the power of C)=B 19 of 32 LOG mulitipilcation rule LOG PQ = LOG P + LOG Q 20 of 32 LOG division rule LOG (P/Q) = LOG P - LOG Q 21 of 32 LOG power rule LOG(Px) = x LOG P 22 of 32 SIN rule when finding an angle SIN A/ a = SIN B/ b (when have 1 angle and 2 sides) 23 of 32 SIN rule when finding a side a/ SIN A = b/ SIN B (when have 1 side and 2 angles) 24 of 32 COSINE rule when finding angle a - b - c / -2 b c = COS A 25 of 32 area of triangle 1/2 ab SIN C 26 of 32 radian and degree equation π radian = 180 degrees 27 of 32 Arc length (radians) S = Ө r 28 of 32 Area of sectore (radians) A= 1/2 r Ө 29 of 32 length of a line (x1 - x2) + (y1 - y2) 30 of 32 midpoint of a line (x1 + x2 / 2 , y1 + y2 / 2 ) 31 of 32 gradient of a line y2- y1 / x2- x1 32 of 32

## Comments

No comments have yet been made