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N76 [4]
3 years ago
14

For a least squares regression line, the sum of the residuals is __________.

Mathematics
1 answer:
Westkost [7]3 years ago
3 0

Answer:

d. always zero.

Step-by-step explanation:

A least squares regression line is a standard technique in regression analysis used to make the vertical distance obtained from the data points running to the regression line to become very minimal or as small as possible.

For a least squares regression line, the sum of the residuals is always zero.

Basically, residuals are used to measure or determine whether or not the line of regression is a good fit or match for the data by subtracting the difference between them i.e the predicted y value and the actual y value, for the x value respectively.

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Newberg is 8 kilometers due north of the airport, and summer field is 15 kilometers due east of the airport. How far apart are n
Karo-lina-s [1.5K]

Answer:

The correct answer is 17 kilometers.

Step-by-step explanation:

Let A denote the point where the airport is located.

Newberg is located 8 kilometers due north of airport say at point B.

Summer field is located 15 kilometers due east of the airport say at point C.

Thus ABC is the required right angled triangle with sides AB = 8; AC = 15; and ∠A = 90°.

Thus we use Pythagoras theorem to find the value of the side BC which indeed would give us the distance between Newberg and Summer field.

∴ BC = \sqrt[2]{ AC^{2} + AB^{2} } = \sqrt[2]{ 15 ^{2} + 8^{2}} = \sqrt[2]{289} = 17 kilometers.

Thus the distance between Newberg and Summer field is 17 Kilometers.

4 0
4 years ago
Someone help 10<br> Points !
Vlada [557]

Answer:

x=1

Step-by-step explanation:

3*1=3  3*3=9

  3+9=12

4 0
3 years ago
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Travka [436]
30 blocks because 6 * 5 = 30
5 0
1 year ago
Samuel is going to invest $4,900 and leave it in an account for 14 years. Assuming the
Vladimir79 [104]

Answer:

0.054

Step-by-step explanation:

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3 years ago
.<br> ...........................
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Answer:

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Step-by-step explanation:

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