Calculate the SSE for the quadratic regression function , calculus homework help

Anonymous
timer Asked: Sep 20th, 2016
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Question Description

Need help with the ones I got wrong. The other persons did not answer correctly.

Question 10 / 20 points

The following table shows total forest and timber land in the United States in millions of acres in the indicated year.

Year

1962

1970

1977

1987

1992

Timberland

759

754

737

731

737



A scatter plot of this data is shown below.

The horizontal variable is the number of years since 1962 and ranges between 0 and 30. Use quadratic regression to find a quadratic function to model the data. Enter your answer in the form y = ax^2+bx+c,where ab, and c have been rounded to three decimal places.
Important note: Do not include spaces in your answer and use the "^" symbol for exponentiation just as on the calculator.

Answer:y=-65.504x^2+ 954.658x - 2114.460
Question 20 / 20 points

The following table shows total forest and timberland in the United States in millions of acres in the indicated year.

Year

1962

1970

1977

1987

1992

Timber Land

759

754

737

731

737



Calculate the SSE for the quadratic regression function (with coefficients rounded to three decimal places) from the previous question. Round your answer to one decimal place.

Answer:0.036 X^2 -142.337 X +141432.488
Question 30 / 20 points

Use the quadratic regression function (with coefficients rounded to three decimal places) to estimate the acerage of timberland in 1982. Round your answer to one decimal place.

Answer:627.2
Question 420 / 20 points

Given four different data sets, a student calculates the quadratic regression as well as the R2 value for each using a TI-83. Which of these results models its respective data the best?

Question options:

a = 1.23

b = -3.27

c = 7.83

R2 = 0.87394

a = -3.745

b = 9.524

c = 12.105

R2 = 0.1420

a = 142.3629

b = 204.2284

c = -428.2079

R2 = 0.9328

a = 35.29

b = 29.94

c = -10.23

R2 = 0.0139

Question 520 / 20 points

Given the three points (0,2), (1,-3) and (2,-5) find the formula for the parabola that contains all three points.

Question options:

y = .05x2-.17x+.14

y = .04x2-.16x+.14

y = 1.5x2+6.5+2

y = 1.5x2-6.5x+2


Tutor Answer

Selenica
School: Duke University

Question 1The actual regression equation is y=0.036x^2-1.976x+761.454(The first answer is not quadratic regr...

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Anonymous
Goes above and beyond expectations !

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