Give reasons why the median age could rise. (Select all that apply.)This trend could be observed if there were an increased lifespan and thus a decreased number of deaths.This trend could be observed if there were an increased lifespan and an increased number of deaths.The median age could rise due to an increase in births over time.The median age could rise due to a decrease in births over time.The median age could rise due to an increase in deaths over time.

The median age of the U.S. population in 1980 was 30.0 years. In 1991, the median age was 33.1 years.(a) What does it mean for the median age to rise?A rising median age in a population usually indicates a dying population.A rising median age in a population usually indicates an aging population.    A rising median age in a population usually indicates that people are dying at a younger age.A rising median age in a population usually indicates that the population is becoming younger.A rising median age in a population usually indicates that more babies are being born.(b) Give reasons why the median age could rise. (Select all that apply.)This trend could be observed if there were an increased lifespan and thus a decreased number of deaths.This trend could be observed if there were an increased lifespan and an increased number of deaths.The median age could rise due to an increase in births over time.The median age could rise due to a decrease in births over time.The median age could rise due to an increase in deaths over time.(c) For the median age to rise, is the actual number of children less in 1991 than it was in 1980? Why or why not? (Enter your percentages as a whole number.)Not necessarily but that could be the case. In 1980, % of the population was 30 years old or less. In 1991, % of the population was 33.1 years old or less. On July 1, 1980, the population was about 227.23 million. On July 1, 1991, the population was about 252.98 million. Since half of the population in 1991 was than half of the population in 1980 and the median age in 1991 was greater than the median age in 1980, there could have been children in 1991.

The median age of first marriage has __________ in the last 50 years.Question 6Select one:a.Increased for men but not womenb.Decreased for men but not womenc.Increased for both men and womend.Decreased for both men and women

A decrease in infant mortality is related to an increase in the average age of death in the developed world.

Which of the following best explains a possible limitation of the trends assumed from the population pyramid and estimates in the data table?ResponsesA period of war followed by a baby boom, similar to that of the 1940s and 1950s, is likely to occur within a generation, increasing the youth-aged cohorts.A period of war followed by a baby boom, similar to that of the 1940s and 1950s, is likely to occur within a generation, increasing the youth-aged cohorts.Modernization of health-care systems may result in improvements in women’s health and pregnancy and result in more children being born, increasing the youth-aged cohorts.Modernization of health-care systems may result in improvements in women’s health and pregnancy and result in more children being born, increasing the youth-aged cohorts.Labor shortages may cause the government to reduce the legal barriers to immigration, and immigrant populations could increase the working-age cohorts.Labor shortages may cause the government to reduce the legal barriers to immigration, and immigrant populations could increase the working-age cohorts.Decreasing populations may cause an economic decline, prompting many citizens to emigrate to other more developed countries and decreasing the working-age cohorts.Decreasing populations may cause an economic decline, prompting many citizens to emigrate to other more developed countries and decreasing the working-age cohorts.Production efficiencies gained from computerization and robotization of manufacturing may free parents from long work hours and result in more time to have additional children, increasing the youth-aged cohorts.

For the median age to rise, is the actual number of children less in 1991 than it was in 1980? Why or why not? (Enter your percentages as a whole number.)Not necessarily but that could be the case. In 1980, % of the population was 30 years old or less. In 1991, % of the population was 33.1 years old or less. On July 1, 1980, the population was about 227.23 million. On July 1, 1991, the population was about 252.98 million. Since half of the population in 1991 was than half of the population in 1980 and the median age in 1991 was greater than the median age in 1980, there could have been children in 1991.