26 28 33 45 48 5 1 50 55 56 58, the average age of these people is calculated as follows:

Mean value = (26+28+33+45+48+51+50+55+56+58)/10 = 45.

Root of standard deviation = [(sum of squares of ten minus sum of squares of ten/10) and then divide by 6].

=[(2 1504-20250)/6].

= 14

So the average age of these ten people is (45+- 14). The original data is only accurate to single digits, so the final value only takes single digits.

The average age is the average age of the population at a certain time and place. In other words, the age difference of each individual is abstracted within the population group to reflect the overall level of the population at a certain time and place.

Scope of application:

The average age is suitable for the comparison of different people in the same period or the same people in different periods. The decline of the average age means that the number of people in the middle and low age groups of the population increases, the proportion increases, and the population is gradually younger; The increase of average age means that the number and proportion of high-age groups increase, and the population is gradually aging.

Baidu encyclopedia-average age