ONLY DO PART d and the QUESTIONS FOR D
a. Copy the population numbers counted each five years, as shown in the data base, for
the years from 1950 to 2000. Add a column, t, measuring years since 1945.
Year |
t |
Population |
1950 |
|
|
1955 |
|
|
1960 |
|
|
1965 |
|
|
1970 |
|
|
1975 |
|
|
1980 |
|
|
1985 |
|
|
1990 |
|
|
1995 |
|
|
2000 |
|
|
b. What is the country you selected? In what part of the world is it? What is the magnitude of its population numbers? (100,000’s, millions, hundred millions, billions?) Is it growing or shrinking in population size?
c. Enter years since 1945 and your population numbers into your graphing calculator.
Create a scatterplot of the data. Is the data growing or shrinking? Does it appear to be a linear pattern or non-linear? Explain your conclusions.
d.
Use your calculator to fit a linear model to the population size.
i. Write the equation of the linear regression and superimpose its graph on your scatterplot.
ii. Use TI-Connect to copy the scatterplot onto your write-up, or just draw a sketch of it.
iii. How well does the linear model fit your data?
iv. What is the vertical intercept of the regression model? What does it mean in the context of the population?
v. What is the slope of the regression model? What does it mean in the context of the population?
vi. Use the model to predict the population size in the year you were born. Also, use the model to predict the population size in the year 2007.
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Extracted text: LL Caps Lock G. H. K Ene A Shift B N Shift Alt Alt Bucky a63,922,588 d) population in/ Round off popilation millions yoars to nearest Million jaas 5. 9,6x10 109 2000 L,os6,575 5ya ,056. sto C)The graph showing the scatter plot of data we see that the data is growing and the pattern population increases due to varioas factors :Ke fortil.ty rate, mortality rater So it cant be is shown as a blackk linė is not lineace Sizó of the 10 linedr Equat.on=yt4x10x tQ. 7MO o Activate Win Go to PC dettir 1995 1965 1970 1975 1980 1985 1990 2000 1945 1950 1955 1960 Population