# Find the Mean (Arithmetic) 67 , 70 , 74 , 74 , 78 , 80 , 81 , 82 , 82 , 84 , 91 , 91 , 91 , 95 67 , 70 , 74 , 74 , 78 , 80 , 81 , 82 , 82 , 84 , 91 , 91 , 91 , 95
The mean of a set of numbers is the sum divided by the number of terms.
67+70+74+74+78+80+81+82+82+84+91+91+91+9514
Simplify the numerator.
Add 67 and 70.
137+74+74+78+80+81+82+82+84+91+91+91+9514
Add 137 and 74.
211+74+78+80+81+82+82+84+91+91+91+9514
Add 211 and 74.
285+78+80+81+82+82+84+91+91+91+9514
Add 285 and 78.
363+80+81+82+82+84+91+91+91+9514
Add 363 and 80.
443+81+82+82+84+91+91+91+9514
Add 443 and 81.
524+82+82+84+91+91+91+9514
Add 524 and 82.
606+82+84+91+91+91+9514
Add 606 and 82.
688+84+91+91+91+9514
Add 688 and 84.
772+91+91+91+9514
Add 772 and 91.
863+91+91+9514
Add 863 and 91.
954+91+9514
Add 954 and 91.
1045+9514
Add 1045 and 95.
114014
114014
Cancel the common factor of 1140 and 14.
Factor 2 out of 1140.
2(570)14
Cancel the common factors.
Factor 2 out of 14.
2⋅5702⋅7
Cancel the common factor.
2⋅5702⋅7
Rewrite the expression.
5707
5707
5707
Divide.
81.42857142
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.
81.4
Find the Mean (Arithmetic) 67 , 70 , 74 , 74 , 78 , 80 , 81 , 82 , 82 , 84 , 91 , 91 , 91 , 95

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