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The following table gives the life expectancy at birth of

Chapter , Problem 1EA

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QUESTION:

Problem 1EA

The following table gives the life expectancy at birth of females born in the United States in various years from 1970 to 2005. Source: National Center for Health Statistics.

Year of Births

Life Expectancy (years)

1970

74.7

1975

76.6

1980

77.4

1985

78.2

1990

78.8

1995

78.9

2000

79.3

2005

79.9

Find an equation for the least squares line for these data, using year of birth as the independent variable.

Questions & Answers

QUESTION:

Problem 1EA

The following table gives the life expectancy at birth of females born in the United States in various years from 1970 to 2005. Source: National Center for Health Statistics.

Year of Births

Life Expectancy (years)

1970

74.7

1975

76.6

1980

77.4

1985

78.2

1990

78.8

1995

78.9

2000

79.3

2005

79.9

Find an equation for the least squares line for these data, using year of birth as the independent variable.

ANSWER:

Solution

Step 1 of 3:  

In this problem, we need to find an equation for the least squares line for the given data.

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