The following table shows the annual number of PhD graduates in a country in various fields. 1990 1995 2000 2005 2010 Natural Sciences 70 130 330 490 590 Engineering 10 40 130 370 550 Social Sciences 60 110 270 470 830 Education 30 40 130 210 520

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The following table shows the annual number of PhD graduates in a country in various fields.
y(t) =
=
1990
r =
1995
2000
2005
2010
2012
Natural
Sciences
70
130
330
490
590
690
Engineering
Xx
10
40
130
370
550
590
Social
Sciences
60
110
270
470
830
1,000
Education
30
40
130
(a) Use technology to obtain the regression equation and the coefficient of correlation r for the number of social science
doctorates as a function of time t in years since 1990. (Round coefficients to three significant digits. Round your r-value to
three decimal places.)
210
520
900
Transcribed Image Text:The following table shows the annual number of PhD graduates in a country in various fields. y(t) = = 1990 r = 1995 2000 2005 2010 2012 Natural Sciences 70 130 330 490 590 690 Engineering Xx 10 40 130 370 550 590 Social Sciences 60 110 270 470 830 1,000 Education 30 40 130 (a) Use technology to obtain the regression equation and the coefficient of correlation r for the number of social science doctorates as a function of time t in years since 1990. (Round coefficients to three significant digits. Round your r-value to three decimal places.) 210 520 900
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