# 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.
137+74+74+78+80+81+82+82+84+91+91+91+9514
211+74+78+80+81+82+82+84+91+91+91+9514
285+78+80+81+82+82+84+91+91+91+9514
363+80+81+82+82+84+91+91+91+9514
443+81+82+82+84+91+91+91+9514
524+82+82+84+91+91+91+9514
606+82+84+91+91+91+9514
688+84+91+91+91+9514
772+91+91+91+9514
863+91+91+9514
954+91+9514
1045+9514
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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