Question

1. How much did the population change between 1950 and 1960? What was the average annual change for that period? Hint: Calculate the changes, then calculate the mean, or average, by dividing by the number of years. State the units clearly. The units are listed on the chart.

2. Repeat question 1 for the period between 1970 and 1980; between 1990 and 1995.

3. Do you think a linear model (or graph) would best illustrate this data? Explain your reasoning.

Answer 1

Explanation:

The 1960 Census of Population is providing a vast amount of detailed statistics reflecting the widespread redistribution of the population during the 1950's. The pattern of population movement during the 1950's parallels, to a great extent, that which occurred during the 1940's, particularly after World War II. To permit better understanding of the population movement, that has occurred from 1950 to 1960, the Bureau of the Census has undertaken the compilation of statistics on the separate components of population change for counties. This is the first time that, estimates of net migration have ever been published for all the counties in the United States. By combining groups of counties into certain widely used statistical areas, such as the standard metropolitan statistical area, State economic area, and economic subregion, one can obtain a broader picture of population movement in the United States.

Answer 2

0.484 billion 0.0484 billion per year

Explanation:

Population change between 1950 and 1960 = 3.039 - 2.555 = 0.484 (billion)

Number of years between 1950 and 1960 = 1960 - 1950 = 10 years

Average population change per year = 0.484 ÷ 10 = 0.0484 billion per year