Answer:
a. Life span increased
b. The median age could rise because of the improvement in medical technology. Also more advertisement of healthier life styles, such as eating healthy could have increase the median age.
c. No because this just shows the increase in life span not the decrease in children.
Step-by-step explanation:
a. more people on average lived longer lives. (explanation)
b. self explanatory I guess, my answer pretty much explained it.
c. life span of US citizens does not effect the children population. I guess you could say people lived longer lives to have more children, so possibly the number of children could have increased.
The correct explanation is
A. Ageing population
b.Higher life expectancy and best medical facilities.
c. yes less children in 1991.
Given The median age of the U.S. population in 1980 was 30.0 years. In 1991, the median age was 33.1 years.
A. The increasing age of the population resulting in rise of the mean.
B. the median age is rise because of higher life expectations and best medical facilities due to modernization with time.
C. yes for the median age to rise, the actual number of children must be less in 1991 than it was in 1980 because if the no. of children is more this could be resulting in less median.
Hence the above explanation is correct.
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