which of the following statements is the objective of the moving averages and exponential smoothing methods? a. to characterize the variable fluctuations by an exponential equation b. to transform a nonstationary time series into a stationary series c. to smooth out random fluctuations in the time series d. to maximize forecast accuracy measures

In statistical analysis, variables are often used to describe and explain relationships between different variables or to predict outcomes based on certain variables.

In statistics, a variable is a characteristic or attribute that can take on different values or levels for different individuals or objects being studied. Variables can be classified as either quantitative or qualitative.

Quantitative variables are numerical in nature and can be further classified as discrete or continuous. Discrete variables can only take on specific values (such as the number of children in a family), while continuous variables can take on any value within a certain range (such as a person's height or weight).

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To construct the incenter of a triangle, construct the angle bisectors of each angle of the triangle. Here are the steps to construct the incenter of a triangle:

Draw the three sides of the triangle using a straightedge.

Choose one of the angles of the triangle and draw its bisector. To do this, place the point of your compass on the vertex of the angle, and draw an arc that intersects both sides of the angle. Without changing the width of your compass, place it on each of the two points where the arc intersects the sides of the angle, and draw two more arcs that intersect. The point where these two arcs intersect is the point where the angle bisector meets the opposite side of the triangle.

Repeat step 2 for the other two angles of the triangle. You should now have three lines that intersect at a single point.

The point where all three angle bisectors intersect is the incenter of the triangle.

Note that the incenter of a triangle is the center of the circle that can be inscribed inside the triangle.

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Answer:

Part A: 4

Part B: 7

Step-by-step explanation:

Part A:

60x + 60 = 300

60x = 240

x = 4

Part B:

55x - 10x = 350

45x = 350

x = 7

Using the properties of exponents we can write the given expression as [tex]x^\frac{3}{2} y^\frac{5}{2}z^\frac{-2}{3}[/tex]. Therefore, option E is the correct answer.

The given expression is [tex]\frac{\sqrt{x^3} \sqrt{y^5} }{\sqrt[3]{z^2} }[/tex].

We can square root as 1/2.

So the expression becomes [tex]\frac{x^\frac{3}{2} y^\frac{5}{2} }{z^\frac{2}{3} }[/tex]

=  [tex]x^\frac{3}{2} y^\frac{5}{2}z^\frac{-2}{3}[/tex]

Therefore, option E is the correct answer.

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(–2, 6) are the points that justify the shaded area

We can substitute the values of x and y from each point into the inequality and check if the inequality is satisfied or not.

Let's check each point:

For points (12, 6):

[tex](y+1)^2/6 -(x+2)^2/24\\ = (6+1)^2/6 - (12+2)^2/24 \\= 49/6 - 196/3 \\= -57.33[/tex]

Here, the value of the expression is less than 1, so this point does not justify the shaded area.

For points (–2, 6):

[tex](y+1)^2/6 -(x+2)^2/24\\ = (6+1)^2/6 - (-2+2)^2/24 \\= 49/6[/tex]

Here, the value of the expression is greater than or equal to 1, so this point does justify the shaded area.

For points (8, –6):

[tex](y+1)^2/6 -(x+2)^2/24 \\= (-6+1)^2/6 - (8+2)^2/24 \\= 25/6-100/24[/tex]

Here, the value of the expression is greater than or equal to 1, so this point does not justify the shaded area.

For point (–1, –2):

[tex](y+1)^2/6 -(x+2)^2/24 \\= (-2+1)^2/6 - (-1+2)^2/24 \\= 1/6 - 1/24 \\= 1/8[/tex]

Here, the value of the expression is less than 1, so this point does not justify the shaded area.

Therefore, the points that justify the shaded area are (–2, 6).

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The answer is option B: 0.040. When Z is a standard normal random variable, it means that Z has a mean of 0 and a standard deviation of 1. Therefore, P(-1.75 < Z < -1.25) represents the area under the standard normal curve between -1.75 and -1.25 standard deviations from the mean.

Using a standard normal distribution table or calculator, we can find that the area under the curve between -1.75 and -1.25 is approximately 0.040. Hence, the answer is option B: 0.040.
 To solve your question, we need to find the probability P(-1.75 ≤ Z ≤ -1.25) where Z is a standard normal random variable.

Step 1: Identify the given values
Z1 = -1.75
Z2 = -1.25

Step 2: Look up the Z-values in a standard normal table or use a calculator to find the corresponding probabilities
P(Z ≤ -1.75) = 0.0401
P(Z ≤ -1.25) = 0.211

Step 3: Use the properties of probabilities to find the required probability
P(-1.75 ≤ Z ≤ -1.25) = P(Z ≤ -1.25) - P(Z ≤ -1.75)
P(-1.75 ≤ Z ≤ -1.25) = 0.211 - 0.0401
P(-1.75 ≤ Z ≤ -1.25) = 0.1709

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Answer:

1) The sum of the distances between the points on the ellipse and the foci is constant, whereas the difference between the distances between the points on the hyperbola and the foci is constant.

2) The equation of an ellipse is in the form (x^2/a^2) + (y^2/b^2) = 1, where a and b are the lengths of the semi-major and semi-minor axes, respectively. In contrast, the equation of a hyperbola is in the form (x^2/a^2) - (y^2/b^2) = 1, where a and b are also the lengths of the semi-major and semi-minor axes, respectively, but the difference between a and b determines the shape of the hyperbola.

Step-by-step explanation:

a. The prime numbers in this list are 5 and 7. b. There are no prime numbers in this list. c. The prime numbers in this list are 31 and 17. d. The prime numbers in this list are 61 and 2.

a. In the list 5, 7, 12, 11, the prime numbers are 5, 7, and 11. Prime numbers are numbers greater than 1 that have only two factors, 1 and themselves.

b. In the list 14, 6, 3, the prime number is 3. The other numbers have more than two factors, making them not prime.

c. In the list 31, 17, 9, 15, the prime numbers are 31 and 17. The numbers 9 and 15 have more than two factors, so they are not prime.

d. In the list 782, 61, 2, the prime numbers are 61 and 2. Number 2 is the smallest prime number, and 61 has only two factors, 1 and 61. The number 782 has more than two factors, so it is not prime.

To summarize, the prime numbers in each list are: a. 5, 7, 11; b. 3; c. 31, 17; d. 61, 2.

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According to the estimated model, holding all else constant, an additional year in age means the market value decreases by approximately $190 (0.019 x 1000).

The size of the house (X1) and the total number of rooms (X2) appear to be statistically significant (at the 0.05 level) in explaining the market value of residential property.

The proportion of the total variation in sales explained by the regression equation is 0.946.

The given F-value shows that the assessor can reject the null hypothesis that neither of the independent variables explains a significant (at the 0.05 level) proportion of the variation in income.

An approximate 95 percent prediction interval for the selling price of a 15-year-old house having 16.00 hundred sq. ft., 3 rooms, and an attached garage is (212.833, 244.525).

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a. The solution to the equation f - 13 = 51 is f = 64.

b. The solution to the equation x/10 = 4 is x = 40.

a. f - 13 = 51

Step 1: Add 13 to both sides to isolate f.

f - 13 + 13 = 51 + 13

Step 2: Simplify.

f = 64

Step 3: Check the answer by substituting f = 64 back into the original equation.

64 - 13 = 51

51 = 51

The answer checks out.

b. (x/10) = 4

Step 1: Multiply both sides by 10 to isolate x.

10(x/10) = 4(10)

Step 2: Simplify.

x = 40

Step 3: Check the answer by substituting x = 40 back into the original equation.

40/10 = 4

4 = 4

The answer checks out.

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The equation of circles that have a diameter of 12 units and a center that lies on the y-axis is (x-0)² + (y-3)² = 6²

The standard form for finding the equation of a circle is expressed as;

(x-a)² + (y-b)²=r²

where;

(a, b) is the center of the circle

r is the radius of the circle

Given the following diameter = 12 units

radius = 12/2 = 6 units

If the centre lies on the y-axis, the center will be at (0, 3)

Substituting into the formula, we will have (x-0)² + (y-3)² = 6² equivalent to x²+ (y-3)² = 36

Hence, the equation of circles that have a diameter of 12 units and a center that lies on the y-axis is (x-0)² + (y-3)² = 6²

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False. The slope of the line is actually -0.5.

Let's determine the slope of the line that passes through the points (20, 5) and (10, 10). To find the slope, we can use the formula:

Slope (m) = (y2 - y1) / (x2 - x1)

Plugging in the coordinates of the two points, we get:

m = (10 - 5) / (10 - 20) = (5) / (-10) = -1/2

The slope of the line is -1/2. Therefore, the statement "If a line passes through the points (20, 5) and (10, 10), then the slope of the line is -2" is FALSE.

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The area of the sector as shown in the diagram is 13.1 cm².

A sector is said to be a part of a circle made of the arc of the circle along with its two radii.

To calculate the area of the sector, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the area of the sector is 13.1 cm².

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Answer:

D. There are no outliers

Step-by-step explanation:

So if you open your eyes and count the numbers you'll realize that 2 is in fact an outlier

Answer: 6.25

Step-by-step explanation:

You have to divided 43.75 ounces by 7 which equals 6.25

The requried coordinate locations of the respective checkpoints at the Reflections of You obstacle course are A' (0,5), B' (9,5), and C' (4,5).

To find the reflected coordinates of each checkpoint in the y-axis, we need to negate the x-coordinate while keeping the y-coordinate the same.

For checkpoint A(0,5), the reflected coordinates A' will be (-0,5) or just (0,5) since reflecting a point over the y-axis does not change its y-coordinate.

For checkpoint B(-9,5), the reflected coordinates B' will be (9,5) since negating -9 gives us 9 and the y-coordinate remains the same.

For checkpoint C(-4,5), the reflected coordinates C' will be (4,5) since negating -4 gives us 4 and the y-coordinate remains the same.

Therefore, the coordinate locations of the respective checkpoints at the Reflections of You obstacle course are A' (0,5), B' (9,5), and C' (4,5).

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a) The total amount of money earned is 7.30 dollars.

b) Max is wrong, it is possible to divide the money equally between Gwen and Max, even though the total amount is an odd number.

a) To find the total amount of money earned, we need to convert the number of quarters and dimes to dollars.

6 quarters = 6 * 0.25 = 1.50 dollars

8 dimes = 8 * 0.10 = 0.80 dollars

The total amount of money earned is:

5 dollars + 1.50 dollars + 0.80 dollars = 7.30 dollars

b) Max is incorrect. The total amount of money earned is an odd number ($7.30), which means it is impossible to divide it equally between two people in whole dollar amounts. However, it is possible to divide the total amount equally if we allow for fractions of a dollar.

For example, if we split the money equally, Gwen and Max would each get $3.65. This means that Gwen would get 3 dollars and 65 cents, while Max would also get 3 dollars and 65 cents.

Therefore, it is possible to divide the money equally between Gwen and Max, even though the total amount is an odd number.

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The data plot in the line plot are skewed right

Given data ,

Let the data be shown in the graph be a line plot

Now , A line plot, also known as a dot plot, is a graphical representation of data where data points are shown as dots along a number line.

A right-skewed line plot would have more dots towards the lower end of the number line, with fewer dots towards the higher end.

From the line plot , we can see that most data points are placed on the lower end of the line plot

Hence , the data is skewed right

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Answer: 60 seconds

Step-by-step explanation:

Answer:

Step-by-step explanation:

60 seconds

When a right rectangular prism is sliced in a way that the plane passes through three intersecting edges, cutting off a corner of the prism, the resulting cross section is a triangle.

Imagine a rectangular prism with the vertices A, B, C, D and H in order to understand this. Assume that the edges AE, and AG are crossed by the plane as it cuts off the corner indicated by vertex A. The triangle formed by the intersection of the plane and the prism will therefore have vertices at positions EFG.

The resulting cross section is a triangle EFG, which is a part of the original rectangular prism. The shape and size of the triangle will depend on the dimensions and orientation of the prism, as well as the specific location where the plane intersects the edges.

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Answer:

If a = -2 and b = 3, then b^a can be calculated as follows:

b^a = 3^(-2)

To find the value of 3^(-2), we can use the rule that says:

a^(-b) = 1 / a^(b)

Thus,

3^(-2) = 1 / 3^2 = 1 / 9

Therefore, the value of b^a, or 3^(-2) is 1/9.

Step-by-step explanation:

The nature of the roots of a quadratic equation in which case, the discriminant is; 81 is; The roots are 2 distinct real roots.

It follows from the task content that the nature of the roots of a quadratic equation in which case, the discriminant is 81 is to be determined.

Recall; when the discriminant of a quadratic equation is greater than 0; the equation is said to have two real distinct roots.

Ultimately, for the given equation in discuss whose discriminant is 81 is such that; it has two real distinct roots.

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As per the mathematical operation both Jillian and Samuel are correct.

Given expression = 30+40+70,

The methodology by Jillian = added 30 and 40 and then 70

The methodology by Samuel = added 30 and 70 and then 40.

Determining the result of the given equation:

30 + 40 + 70

= 140

Reviewing the operations of both Jillian and Samuel

Jillian

He added 30 and 40 and then 70:

30 + 40 = 70

70 + 70 = 140

Samuel

He added 30 and 70 and then 40

30 + 70 = 100

100 + 40 = 140

The result of both mathematical operations is 140. Thus, it can be stated that both are correct.

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Therefore, the statement is false in general, and the equality Dkf(x, y, z) = fz(x, y, z) holds only when k = z.

The symbol Dk denotes the k-th partial derivative with respect to the variable k, so Dkf(x, y, z) denotes the partial derivative of f(x, y, z) with respect to the variable k.

On the other hand, fz(x, y, z) denotes the partial derivative of f(x, y, z) with respect to the variable z.

These two partial derivatives are generally not equal. For example, consider the function f(x, y, z) = x² + y² + z². Then:

Dxf(x, y, z) = 2x

Dyf(x, y, z) = 2y

Dzf(x, y, z) = 2z

In this case, we have Dzf(x, y, z) = fz(x, y, z) = 2z, so the statement is true when k = z.

However, if we consider k = x or k = y, then the statement is false in general. For example, when k = x, we have:

Dkf(x, y, z) = Dxf(x, y, z) = 2x

fz(x, y, z) = partial derivative of f with respect to z = 2z

Since 2x is generally not equal to 2z, the statement is false when k = x.

Similarly, the statement is false when k = y, because Dyf(x, y, z) is generally not equal to fz(x, y, z).

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The value of the product is 1/4

To determine the value of the product, we need to take note that fractions are described as the part of a whole number, element, or variable.

In mathematics, there are different types of fractions, namely;

From the information given, we have that;

1/4 × 25/25

Now, multiply the numerators

25/4(25)

Multiply the denominators

25/100

Divide the values

1/4

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a) The probability of picking a blue tile = 1/5

b) The probability of picking a yellow tile = 1/2

c) The probability of picking a red tile = 3/10

Given data ,

Let the total number of tiles in the bag = 10 tiles

The number of blue tiles = 2

The number of red tiles = 3

The number of yellow tiles = 5

So , probability of picking a blue tile = 2/10 = 1/5

Now , probability of picking a yellow tile = 5 / 10 = 1/2

And , probability of picking a red tile = 3/10

Hence , the probability is solved

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1.) The probability that the spinner will land on C would be = 1/8

2.) The probability of not spinning on C would be = 7/8

To calculate the probability the formula that should be used would be as follows;

Probability = possible outcome/sample space.

For question 1.)

sample space = 8

possible outcome = 1

probability = 1/8

For question 2.)

sample space = 8

possible outcome = 7

probability = 7/8

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The key features of f(x) = 2√[x + 7] - 1 are

From the question, we have the following parameters that can be used in our computation:

f(x) = 2√[x + 7] - 1

The graph of the function is attached, where we have the following features

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Answer: x^2 + bx/a + c/a = 0

Step-by-step explanation:

the step simplifies the division of a:

0 divided by anything is still zero, so you can remove the a denominator

a/a = 1, and is therefore irrelevant, so ax^2 / a = x^2

the rest can stay

Answer:

1.4

Step-by-step explanation: