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shtirl [24]
3 years ago
15

With regard to a​ regression-based forecast, the standard error of the estimate gives a measure of A. the variability around the

regression line. B. the time required to derive the forecast equation. C. the maximum error of the forecast. D. the time period for which the forecast is valid.
Mathematics
1 answer:
Travka [436]3 years ago
8 0

Answer:

B. the variability around the regression line.

Step-by-step explanation:

The standard errors represents the distance (how sparse) the observed values fall from the regression line.

Standard errors for regression are measures of the spread of variables around the average (regression line)

The standard error is dependent on the standard deviation of the observations and the reliability of the test.

When the test is perfectly reliable, the standard error is zero and when unreliable, it is equal to the standard deviation of the observations.

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The perimeter of a rectangle is 36m. If its length is increased by 1m and the width is increased by 2m, its area will increase b
maw [93]

Answer:

  80 m^2

Step-by-step explanation:

The given information lets you write two equations involving length (x) and width (y).

  • 2(x +y) = 36 . . . . the perimeter is 36 m
  • (x+1)(y+2) -xy = 30 . . . . increasing the length and width increases area

The second of these equations simplifies to another linear equation, giving a system of linear equations easily solved.

  xy +y +2x + 2 -xy = 30

  2x +y = 28 . . . . . . . subtract 2

Dividing the first equation by 2 gives

  x +y = 18

and subtracting this from the above equation gives ...

  (2x +y) -(x +y) = 28 -18

  x = 10

Then

  y = 18 -10 = 8

The area of the original rectangle is xy = 10·8 = 80 m^2.

4 0
3 years ago
Find the equation of the axis of symmetry of the following parabola algebraically.<br> y=2x^2+16.
Inessa05 [86]

Answer:

x = 0

axis of symmbery = -b/2a or x vertex on quadratic equation

0/4=0

x=0

Step-by-step explanation:

3 0
2 years ago
Zuri quickly solved the problem and told her team, "Hey! I go it m\large \angleA = 93°, m\large \angleB = 63°, m\large \angleC =
Step2247 [10]

Answer:

Mikaya and Olivia are correct to be suspicious

Step-by-step explanation:

Sum of the angles of a triangle is always 180

But, The sum of all angles of the triangle that Zuri solved = 93 + 63 + 36 = 192 ≠ 180

So, Zuri is wrong

8 0
3 years ago
Find the 9th term of an arithmetic sequence that has a 4th term of 27 and a 5th term of 19
Harman [31]

Answer:

-13

Step-by-step explanation:

5th term - 4th term = common difference

= 19 - 27

= -8

Thus the 9th term =   5th term +  4(-8)

=  19 - 32

= -13  (answer

4 0
3 years ago
Bruce's hourly wage increased from $15.50 to $18.60. What ratr of increase does this represent?
Galina-37 [17]

Answer:

New price 3.10

Step-by-step explanation:

5 0
3 years ago
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