# Find the Mean (Arithmetic) -25 , -20 , -13 , -2 , 9 , 15 , 17 , 14 , 7 , -4-4 , -16 , -23 -25 , -20 , -13 , -2 , 9 , 15 , 17 , 14 , 7 , -4-4 , -16 , -23
Subtract 4 from -4.
-25,-20,-13,-2,9,15,17,14,7,-8,-16,-23
The mean of a set of numbers is the sum divided by the number of terms.
-25-20-13-2+9+15+17+14+7-8-16-2312
Simplify the numerator.
Subtract 20 from -25.
-45-13-2+9+15+17+14+7-8-16-2312
Subtract 13 from -45.
-58-2+9+15+17+14+7-8-16-2312
Subtract 2 from -58.
-60+9+15+17+14+7-8-16-2312
Add -60 and 9.
-51+15+17+14+7-8-16-2312
Add -51 and 15.
-36+17+14+7-8-16-2312
Add -36 and 17.
-19+14+7-8-16-2312
Add -19 and 14.
-5+7-8-16-2312
Add -5 and 7.
2-8-16-2312
Subtract 8 from 2.
-6-16-2312
Subtract 16 from -6.
-22-2312
Subtract 23 from -22.
-4512
-4512
Reduce the expression by cancelling the common factors.
Cancel the common factor of -45 and 12.
Factor 3 out of -45.
3(-15)12
Cancel the common factors.
Factor 3 out of 12.
3⋅-153⋅4
Cancel the common factor.
3⋅-153⋅4
Rewrite the expression.
-154
-154
-154
Move the negative in front of the fraction.
-154
-154
Divide.
-3.75
The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.
-3.8
Find the Mean (Arithmetic) -25 , -20 , -13 , -2 , 9 , 15 , 17 , 14 , 7 , -4-4 , -16 , -23

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