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antiseptic1488 [7]
3 years ago
6

Suppose that a least squares regression line equation is ˆy = 1.65 − 2.20x and the actual y value corresponding to x = 10 is −19

, what is the residual value corresponding to y = −19?
a. 1.35
b. −1.35
c. 2.10
d. −2.10
Mathematics
1 answer:
erik [133]3 years ago
3 0
I think its b or d if im wrong sorry hoped this helped tho :p
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Read 2 more answers
Solve for the missing variable.
yan [13]

Answer:

  • x ≈ 6.3
  • y ≈ 7.7
  • z ≈ 4.9

Step-by-step explanation:

In this geometry, there are three "geometric mean" relations that apply. They can be summarized by the rule ...

  <em>a segment touching the hypotenuse is equal to the geometric mean of the segments of the hypotenuse it touches</em>.

For x and y, the two segments will be the short one (4 or 6, respectively) and the entire hypotenuse (4+6=10).

Using this rule, we have ...

  x = √(4·10) ≈ 6.3

  y = √(6·10) ≈ 7.7

  z = √(4·6) ≈ 4.9

__

The geometric mean of two numbers is the square root of their product.

_____

<em>Additional comment</em>

These relations come about because all of the right triangles in this figure are similar. That means corresponding sides are proportional.

  x/10 = 4/x   ⇒   x² = 40

  y/10 = 6/y   ⇒   y² = 60

  z/6 = 4/z   ⇒   z² = 24

6 0
3 years ago
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