the mean of 8 numbers is minus 15 is earth number multiplied by 18 what is the number of number of number mean
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Heya !!!
Let the observations are X1 , X2 , X3 , ........X8.
Mean = Sum of observations/Number of obver.
-15 = X1 + X2 + X3.......+X8 / 8
X1 + X2 + X3 .....+X8 = -15 × 8
X1 + X2 + X3 +.....X8 = -120
Each obsetvations are Multiplied by 18 . New observations are :
X1 × 18 , X2 × 18 , X3 × 18 ...,.......X8 × 18
Mean = Sum of obsetvations/Number of obser
Mean = X1 × 18 + X2 × 18 + X3 × 18.….....X8×18/8
Mean = 18( X1+ X2+ X3......X8)/ 8
Mean = 18 × -120/8
Mean = -288
HOPE IT WILL HELP YOU...... :-)
Let the observations are X1 , X2 , X3 , ........X8.
Mean = Sum of observations/Number of obver.
-15 = X1 + X2 + X3.......+X8 / 8
X1 + X2 + X3 .....+X8 = -15 × 8
X1 + X2 + X3 +.....X8 = -120
Each obsetvations are Multiplied by 18 . New observations are :
X1 × 18 , X2 × 18 , X3 × 18 ...,.......X8 × 18
Mean = Sum of obsetvations/Number of obser
Mean = X1 × 18 + X2 × 18 + X3 × 18.….....X8×18/8
Mean = 18( X1+ X2+ X3......X8)/ 8
Mean = 18 × -120/8
Mean = -288
HOPE IT WILL HELP YOU...... :-)
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