The table below gives the estimated world population (in billions) for various years. Year 1980 1990...
The table below gives the estimated world population (in billions) for various years.
|
Year |
1980 |
1990 |
1997 |
2000 |
2005 |
2011 |
|
Population |
4400 |
5100 |
5852 |
6080 |
6450 |
7000 |
Linear Regression Equation: ____________________
Correlation Coefficient (r): _________
Type of Correlation: ______________________
Is the correlation strong? Explain
Using the linear regression equation predict
the world population in the year 2015.
Homework Answers
Ans:
Regression equation:
y'=84.91x-163766
correlation coefficient,r=0.998
Positive linear relationship
Yes,strong,as r>0.85
when x=2015
y'=84.91*2015-163766=7327.65
Add Answer to:
The table below gives the estimated world population (in
billions) for various years.
Year
1980
1990...
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Year Population
1900 200507
1910 430980
1920 732016
1930 1265258
1940 1394711
1950 1451277
1960 1424815
1970 1471701
1980 1168972
1990 1203789
2000 1332650
2010 1385108
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A.) find an equation for the
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Sciences
Engineering
Social
Sciences
Education
1990
70
10
60
30
1995
130
40
120
50
2000
330
130
280
120
2005
490
370
460
210
2010
590
550
830
520
2012
690
590
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Test: PRACTICE Final Submit Test This Question: 1 pt 7 of 25 This Test: 25 pts possible Year Expenditures (S bilions) The table shows the national expenditures for health care, in billions, in a country for selected years from 1995 with projections to 2020 Complete parts (a) through (c) below. 1995 2000 2005 2010 2015 2020 1013 1340 1976 2933 3283 4321 a. Find a linear function that models the data, with x equal to the number of years ater...
Year Population
1900 200507
1910 430980
1920 732016
1930 1265258
1940 1394711
1950 1451277
1960 1424815
1970 1471701
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2000 1332650
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12. In 2015, 88% of US residents used the internet, up from 14% in 1995 The table shows the percent who use the internet for selected years from 2000 and projected to 2025. Year 2000 2005 2010 2015 2020 2025 Percent 67 79 82 88 95 98 Find the logarithmic function that models the percent p as a function of x, the number of years after 1990. State the correlation coefficient. a) b) Use the model to predict the percentage...
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A.) find an equation for the
least squares line, letting x equal the number of years since
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the equation is Y= ____ x +_____
B.) Based on the answer to part (a), at approximately what rate
is consumer credit growing per year?
the consumer credit is growing $_____ billion per year
C.) Use the result from part (a) to predict the amount of
consumer credit in the year 2016...
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Education
1990
70
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1995
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120
50
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120
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210
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590
550
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520
2012
690
590
1,000
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