The estimated regression equation by the least squares method minimizes the sum of squared differences between observed values and predicted values.
The least squares method is used in regression analysis to find the line or curve that best fits a given set of data points. It achieves this by minimizing the sum of squared differences (also known as residuals) between the observed values and the corresponding predicted values from the regression equation. The "sum of squared differences" refers to the sum of the squared vertical distances between each data point and the regression line. By squaring the differences, larger deviations from the regression line have a greater impact on the overall sum. Minimizing this sum ensures that the estimated regression equation provides the best possible fit to the data points by reducing the overall error between the observed values and the predicted values. In summary, the least squares method finds the estimated regression equation that minimizes the sum of squared differences, allowing us to model and predict the relationship between variables based on the best fit to the given data.
The estimated regression equation by the least squares method minimizes the sum of squared differences between observed values and predicted values.
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planets around other stars can be detected by carefully measuring the ___ of stars
Planets around other stars can be detected by carefully measuring the "brightness" or "light intensity" of stars.
When a planet orbits a star, it causes a slight change in the brightness or light intensity of the star. This is known as the transit method of planet detection. As the planet passes in front of the star from our line of sight, it blocks a small portion of the star's light, causing a temporary decrease in its brightness. By carefully measuring these changes in brightness over time, scientists can infer the presence and characteristics of planets orbiting the star. This method has been instrumental in the discovery of numerous exoplanets in recent years.
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Mary evaluates goods 1 and 2 according to the following utility function: u(x1,x2 )=3x1 +x2
. For which of the following vectors of prices would Mary only buy good 1 ?
a. p1=3,p2 =2
b. p 1 =10,p2=3
c. p1=4,p2=1
d. p1=15,p2 =4
e. None of the above, since the price of good 1 is larger than the price of good 2
The price vectors a. p₁ = 3 and p₂ = 2, Mary will consume only good 1.
Here we have the Utility function as
U(x₁ , x₂) = 3x₁ + x₂
From the given utility function we can clearly see that these goods are substitutes for each other
Now,
δU/δx₁ = 3
δU/δx₂ = 1
Hence we get the Marginal Rate of Substitution or MRS
\(=- \frac{\delta U/ \delta x_1 }{\delta U/ \delta x_2}\)
= -3
The MRS signifies that for every additional unit of 1, Mary is willing to give up 3 units of good 2
|MRS| = 3
For Mary to only consume good 1, |MRS| > p₁/p₂
Hence here we get the p/p ratio for the 4 price vectors to be
a. 3/2 = 1.5
b. 10/3 = 3.33
c. 4
d. 15.4 = 3.75
Hence we can clearly say that for the price vectors p₁ = 3 and p₂ = 2, Mary will consume only good 1.
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Approximate negative thirteen plus square root of seventy to the nearest tenth.
−8.4
−4.6
4.6
8.4
Answer:-4.6
Step-by-step explanation:
What is 12/30 simplified?
Answer: hey good morning, 12/30 simplified is 2/5 hope this helped :))
Step-by-step explanation:
HELP PLEASE
Which best represents the transformation for the coordinates of the vertices of the given pairs of triangles?
(1, 6), (−1, 3), (5, −2) and
(−1, 6), (−3, 3), (3, −2)
Step-by-step explanation:
what is the difference between the x- values ?
and what is the difference between the y- values ?
a transformation means a simple shift. so, addition of subtraction. no multiplication or such.
1 to -1 ? -2
-1 to -3 ? -2
5 to 3 ? -2
6 to 6 ? 0
3 to 3 ? 0
-2 to -2 ? 0
so, the transformation is (-2, 0)
solve the following differential equation using method of undetermined coefficients
y" +49 y = 2x² + 5cos 7x
The yc(x) is the complementary solution, and yp1(x) and yp2(x) are the particular solutions for the 2x² and 5cos(7x) terms
using the method of undetermined coefficients, we first identify the complementary and particular solutions.
The complementary solution comes from the homogeneous equation
\( y'' + 49y = 0.\)
This has the characteristic equation r² + 49 = 0, giving us r = ±7i. So, the complementary solution is
\(yc(x) = C1cos(7x) + C2sin(7x).\)
For the particular solution, we have two terms:
\( 2x² and 5cos(7x)\). For the 2x² term, we assume\( yp1(x) = Ax² + Bx + C.\) Plugging into the equation, we find the coefficients A, B, and C.
For the 5cos(7x) term, the assumed particular solution is
\( yp2(x) = Dcos(7x) + Esin(7x).\)
Since this overlaps with the complementary solution, we must multiply by x, so
\(yp2(x) = x(Dcos(7x) + Esin(7x)).\)
Plug it into the equation to determine D and E.
Finally, the general solution is \(y(x) = yc(x) + yp1(x) + yp2(x)\),
where yc(x) is the complementary solution, and yp1(x) and yp2(x) are the particular solutions for the 2x² and 5cos(7x) terms, respectively.
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Fractions confuse me. Please help.
An automatic sprinkler system uses 2 and one-third gallons of water in one
minute. How long will it take for the system to use 400 and two-thirds gallons of
water? Help smart people!!!!
Answer:
Hi there!
Your answer is:
It will take 171 minutes and approximately 43 seconds to use 400 and 2/3rds gallons of water! If you need it in decimal format, your answer is 171.71!
Step-by-step explanation:
2 & 1/3 gals per 1 minute
Divide by 2 & 1/3 to determine mins per 1 gal
1gal per 3/7ths of a minute
× 400 & 2/3
400 & 2/3 gals per 171 & 5/7ths minutes
I hope this makes sense!
Calculate the rate of change.
Answer:
2
Step-by-step explanation:
Rise is 10 run is 5 Rate of Change is rise over run.
linear equation thats a horizontal line on a graph example
An example of a linear equation that represents a horizontal line is expressed as: y = 1.
What is the Linear Equation of a Horizontal Line?The linear equation that represents a horizontal line is expressed as y = b, where the value of b is the point on the x-axis where the line intercepts the y-axis horizontal line. The point is on the line is (0, b).
An example of a graph that shows a horizontal line is attached below where the line cuts the y-axis at (0, 1). Thus, the linear equation is expressed as y = 1.
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A toy train set includes a train station building which is a scale model of a real building. The area of the front side of the toy building is 1 square foot. The real building's front side has an area of 900 square feet. If we view the real building as a dilation of the toy, what is the scale factor?
The required scale factor between the building and toy model is given as 900.
What is the scale factor?The scale factor is defined as the ratio of the modified change in length to the original length.
Here,
The area of the front side of the toy building is 1 square foot.
The real building's front side has an area of 900 square feet.
The real buildings as a dilation of the toy,
Scale factor = 900 /1
Scale factor = 900
Thus, the required scale factor between the building and the toy model is given as 900.
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The problem is a word problem: The sum of two consecutive odd numbers is 72. find the numbers
Answer:
35 and 37
Step-by-step explanation:
consecutive ODD numbers, 35 then 37.. 35+37 = 72
Helen earns $7.50 an hour at her job, but if she works more than 35 hours in a week, she is paid 1over 1/2 times her regular salary for the overtime hours worked. One week her gross pay was $386.25. How many overtime hours did she work that week?
Answer:
11 hours
Step-by-step explanation:
$386.25 - (35 x $7.50) = $123.75 <--- overtime
$7.50 x 1.5 = $11.25
$123.75 / $11.25 = 11 hours overtime
You already have $75. The monitor costs a total of $400. You save $25 each week. Write an equation using w, to represent the number of weeks that you will have to save in order to purchase the monitor. Use your equation and solve algebraically. Explain your solution.
Answer:
75+325=400/25=16
13 more
16weeks total
And
Step-by-step explanation:
Round 9.457 to the nearest whole number
Answer: 10
Step-by-step explanation:
9.457
Above 5= change of # before decimal point
Answer:
9
Step-by-step explanation:
9.4 rounds down to 9, if it were 9.5 it would round up to 10
HELP HELP HELP!! I’ll mark brainliest!! If a combination is randomly chosen, what is the probability of someone getting a salad and a chicken sandwich?
Answer:
1/12
Step-by-step explanation:
because because you have one choice out of 12 choices and that gives you 112
Is it possible to solve 3 equations with 4 variables?
A linear system with 3 equations and 4 variables by representing it with an augmented matrix and bringing the matrix to reduced row-echelon form can be solved.
What is linear system?A mathematical representation of a system based on the application of a linear operator is known as a "linear system" in systems theory. Ordinarily, compared to nonlinear systems, linear systems display much simpler features and properties. The automatic control theory, signal processing, and telecommunications all heavily rely on linear systems as a mathematical abstraction or idealisation.
Linear systems, for instance, are frequently used to model the propagation medium for wireless communication systems. An operator, H, that converts an input, x(t), into an output, y(t), a kind of black box description, can be used to describe a general deterministic system.
The superposition principle, or alternatively both the additivity and homogeneity properties, must be satisfied by a system to be considered linear, and only then.
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What is the midline equation of y = -5 cos (2πx + 1) - 10?
y =
Step-by-step explanation:
The -5 makes the waveform amplitude of 5 the wave goes down to -5 and up to +5 BUT the -10 shifts the whole wave down 10
so it goes from -15 to -5 and the midline is then y = -10
(6) (5 marks) Use the definition of the Taylor series to find the first four nonzero terms of the series for f(x) = x2/3 centered at x = 1. Next use this result to find the first three nonzero terms i
The Taylor series for f(x) = x^(2/3) centered at x = 1 has the first four nonzero terms: 1 + (2/3)(x - 1) + (2/9)(x - 1)^2 + (4/81)(x - 1)^3.
To find the Taylor series for f(x) = x^(2/3) centered at x = 1, we need to calculate its derivatives at x = 1. Taking the first four nonzero derivatives, we have f'(x) = (2/3)x^(-1/3), f''(x) = (-2/9)x^(-4/3), and f'''(x) = (8/81)x^(-7/3).
Evaluating these derivatives at x = 1, we obtain f'(1) = 2/3, f''(1) = -2/9, and f'''(1) = 8/81. Using these values and the general formula for the Taylor series, we can write the first four nonzero terms as 1 + (2/3)(x - 1) + (2/9)(x - 1)^2 + (4/81)(x - 1)^3. To find the first three nonzero terms, we simply omit the last term from the series.
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Will V − E + F always equal 2?
The expression V − E + F is an illustration of the Euler's formula.
The expression V − E + F is always 2
How to determine the true statement?The equation is given as:
V - E + F = 2
Where:
V represents the verticesE represents the edgesF represents the facesAccording to the Euler's formula, the relationship between V, E and F is:
V + F = 2 + E
Subtract E from both sides
V - E + F = 2
Hence, the expression V − E + F is always 2
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Find the area ratio of a regular octahedron and a tetrahedron regular, knowing that the diagonal of the octahedron is equal to height of the tetrahedron.
Answer:
\(\frac{4}{3}\)
Step-by-step explanation:
The area of a regular octahedron is given by:
area = \(2\sqrt{3}\ *edge^2\). Let a is the length of the edge (diagonal).
area = \(2\sqrt{3}\ *a^2\)
Given that the diagonal of the octahedron is equal to height (h) of the tetrahedron i.e.
a = h, where h is the height of the tetrahedron and a is the diagonal of the octahedron. Let the edge of the tetrrahedron be e. To find the edge of the tetrahedron, we use:
\(h=\sqrt{\frac{2}{3} } e\\but\ h=a\\a=\sqrt{\frac{2}{3} } e\\e=\sqrt{\frac{3}{2} }a\)
The area of a tetrahedron is given by:
area = \(\sqrt{3}\ *edge^2\) = \(\sqrt{3} *(\sqrt{\frac{3}{2} }a)^2=\frac{3}{2}\sqrt{3} *a^2\)
The ratio of area of regular octahedron to area tetrahedron regular is given as:
Ratio = \(\frac{2\sqrt{3}\ *a^2}{\frac{3}{2} \sqrt{3}*a^2} =\frac{4}{3}\)
solve pls brainliest
Answer:
3/4
Step-by-step explanation:
Answer:
2 ÷ 8/3 is 0.75 !!
there you go!
6) A TV and external speakers cost $1,020. The cost of the TV is double that of the speakers.
How much do the TV and the speakers cost? Show your work.
P Q R S is a four digit number. Find the number given the following clues:
Clue 1: All digits are different.
Clue 2: The product of digits R and S equals digit P.
Clue 3: Digit Q is one more than P.
Clue 4: The sum of all digits is 18.
Clue 5: The four digit number is divisible by 11.
The four-digit number that satisfies all the given clues is 5284.
In the given clues, we can analyze each condition to find the number.
Clue 1 states that all digits are different. Therefore, we can deduce that the digits are 5, 2, 8, and 4.
Clue 2 states that the product of digits R and S equals digit P. Looking at the available digits, the only combination that satisfies this condition is 8 and 4, as 8 * 4 = 32, and digit P can only be 3.
Clue 3 states that digit Q is one more than P. Since P is 3, Q must be 4.
Clue 4 states that the sum of all digits is 18. Adding up the digits 5 + 2 + 8 + 4 gives us 19, which does not meet the condition. Hence, we can conclude that Clue 4 is not valid or that there may be a mistake in the clues.
Finally, Clue 5 states that the four-digit number is divisible by 11. By checking the divisibility rule for 11, we find that 5284 is divisible by 11.
Therefore, the number that satisfies all the given clues is 5284.
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find the area and perimeter
Answer:
The p=3 I think the area is 13 if im wrong srry
Step-by-step explanation:
Which statement describes graph
Answer:
Step-by-step explanation:
There are no statements here
Clea Q3. Maricela was driving her car at 55 mph for six hours. How far has Maricela traveled? D -> RIT
Answer:
Step-by-step explanation:
6hr(55mi/hr)
330mi
Please answer correctly !!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!!!
Answer:
140
Step-by-step explanation:
cause alternate interior angles
solve for y and show all work.
Answer: 29
Step-by-step explanation:
4y + 4 + 60 = 180
4y = 116
y = 29
What is the equation of the line that passes through the point (-1,6) and has a y-intercept of -5
well, since the y-intercept is at -5, or namely when the line hits the y-axis is at -5, that's when x = 0, so the point is really (0 , -5), and we also know another point on the line, that is (-1 ,6), to get the equation of any straight line, we simply need two points off of it, so let's use those two
\(\stackrel{y-intercept}{(\stackrel{x_1}{0}~,~\stackrel{y_1}{-5})}\qquad (\stackrel{x_2}{-1}~,~\stackrel{y_2}{6}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{6}-\stackrel{y1}{(-5)}}}{\underset{run} {\underset{x_2}{-1}-\underset{x_1}{0}}} \implies \cfrac{6 +5}{-1} \implies \cfrac{ 11 }{ -1 } \implies - 11\)
\(\begin{array}{|c|ll} \cline{1-1} \textit{point-slope form}\\ \cline{1-1} \\ y-y_1=m(x-x_1) \\\\ \cline{1-1} \end{array}\implies y-\stackrel{y_1}{(-5)}=\stackrel{m}{- 11}(x-\stackrel{x_1}{0}) \implies y +5 = - 11 ( x -0) \\\\\\ y+5=-11x\implies {\Large \begin{array}{llll} y=-11x-5 \end{array}}\)