TRUE/FALSE. when we conduct time series forecasting it is safest to utilize regression analysis, because then we will not be extrapolating.

Answers

Answer 1

When we conduct time series forecasting it is safest to utilize regression analysis, because then we will not be extrapolating the above statement is False.

Regression analysis is a group of analytical techniques used to measure the relationships between a dependent variable and one or more independent variables. It may be used to simulate the long-term link between variables and gauge how strongly the relationships between them are related.

Models that evaluate the connection between a dependent variable and an independent variable include simple linear regression. The following equation represents the simple linear model:

Y = a + bX + ϵ

Regression analysis is the most secure method for time series forecasting since it involves extrapolation.

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Related Questions

find the area of the circle, which is circumscribed about the isosceles right triangle with area 8

Answers

Answer:8π

Step-by-step explanation:

To find the area of the circle circumscribed about an isosceles right triangle, we first need to determine the length of the hypotenuse of the triangle.

Given that the area of the isosceles right triangle is 8, we can use the formula for the area of a triangle:

Area = (1/2) * base * height

Since the triangle is isosceles and right-angled, the base and height are equal. Let's denote the base and height as 'x'.

8 = (1/2) * x * x

16 = x^2

x = √16

x = 4

Therefore, the length of the hypotenuse of the triangle is 4√2 (using the Pythagorean theorem).

Now, the diameter of the circle is equal to the hypotenuse of the triangle. So, the diameter of the circle is 4√2.

The radius of the circle is half the diameter, so the radius is (4√2)/2 = 2√2.

The area of a circle is calculated using the formula:

Area = π * radius^2

Plugging in the value of the radius, we get:

Area = π * (2√2)^2

Area = π * 4 * 2

Area = 8π

Therefore, the area of the circle circumscribed about the isosceles right triangle with area 8 is 8π.

sent help please urgent

Answers

calling 911 rn
they’re asking what help

Which quadratic equation has roots - 2 and 1/5 :

Answers

Answer:

$5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

Step-by-step explanation:

$sum \: of roots = - 2 + \frac{1}{5} = - \frac{8}{5} \\ product \: of \: roots = - 2 \times \frac{1}{5} = - \frac{2}{5} \\ from \: general \: equation \\ a {x}^{2} + bx + c = 0 \\ {x}^{2} + \frac{8}{5} x \: - \frac{2}{5} = 0 \\ 5 {x}^{2} \: + \: 8x \: - 2 \: = \: 0$

Determine the effective tax rate for a taxable income of $115,500. Round theginal answer to the nearest hundredth
A) 18.71%
B) 17.20%
C) 24.10%
D) 24.75%

Answers

The effective tax rate for a taxable income of $115,500 is A) 18.71%

How to calculate the tax

The introductory $10,275 is subjected to a 10% tax burden, with the converted dollar amount representing $1,027.50 in taxes. The additional taxable sum of $30,900 ($41,175 - $10,275) is accessed at a 12% charge and aggregates to $3,708 worth of duties. An extra levy of 22% is imposed on the total $47,900 that lies between the two stipulated ranges ($89,075 - $41,175). The final evaluation stands at 24%, which provides an identical tax rate for the remaining $25,350 ($115,500 - $89,075). ).

Effective Tax Rate = (Total Tax Paid / Taxable Income) x 100%; which further articulates to ($21,357.50 / $115,500) x 100%,

= 18%

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Based upon these results, how many two-dozen tulip arrangements should the florist expect to sell if it anticipates 4,600 more customers?

Answers

Without additional details, we cannot determine the number of two-dozen tulip arrangements the florist should expect to sell with the anticipated 4,600 more customers.

To determine the number of two-dozen tulip arrangements the florist should expect to sell if they anticipate 4,600 more customers, we need to examine the given results and make a reasonable assumption based on the available information.

Unfortunately, the given results or information regarding the number of tulip arrangements sold or the relationship between customers and sales are not provided. Without this data, it is not possible to accurately estimate the number of arrangements that will be sold with an additional 4,600 customers.

To make an accurate prediction, we would need more information such as the average number of tulip arrangements sold per customer or any patterns or trends observed in the sales data.

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D. -1 7. A weaver bought a bundle of grass for $50.00 from which he made 8 mats. If each mat was sold for $ 15.00, find the percentage profit. 10 %

Answers

Profit percentage for weaver after selling mat is equals to 140%.

What is percentage ?

" Percentage is defined as the hundredth part of the whole given quantity. It is represented by symbol %."

Formula used

Profit% = $(\frac{Profit }{cost price} )$× 100

According to the question,

Given,

Cost price of bundle of grass = $50.00

Number of mats made = 8

Selling price of each mat = $15.00

Therefore,

Selling price of 8 mats = 15 × 8

= $120

Selling price > Cost price

Therefore,

Profit = Selling price - Cost price

= 120 - 50

= $70

Substitute the value in the formula to get profit percentage we get,

Profit% = $\frac{70}{50}$ ×100

= 140%

Hence, profit percentage for weaver after selling mat is equals to 140%.

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The length of time it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of 4 minutes and a standard deviation of 3 minutes.
Find the probability that it takes at least 6 minutes to find a parking space. (Round your answer to four decimal places.)

Answers

The probability that it takes at least 6 minutes to find a parking space is given as: 0.1587. See the explanation below.

What is probability?

Probability is an area of mathematics that deals with numerical representations of how probable an event is to occur or how likely a statement is to be true. The probability of an occurrence is a number between 0 and 1, where 0 denotes the event's impossibility and 1 represents certainty.

The working of the above solution is given as follows:

Given:

Mean = 4 minutes

Standard deviation = 3 minutes

P(X < A) = P(Z < (A - mean) /standard deviation)

P(at least 6 minutes) = P(X≥6)

= 1 - P(X < 6)

= 1 - P(Z < (6 - 4)/2)

= 1 - P(Z < 1)

= 1 - 0.8413

P = 0.1587

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NO LINKS!! URGENT HELP PLEASE!!!

Determine if the sequence is arithmetic. If it is, find the common difference, the 52nd term, and the explicit formula.

34. -11, -7, -3, 1, . . .

Given the explicit formula for an arithmetic sequence find the common difference and the 52nd term.

35. a_n = -30 - 4n

Answers

Answer:

#34. aₙ = 4n - 15; a₅₂ = 193#35. a₅₂ = -238; d = - 4

-----------------

Question 34

Find the differences in the sequence -11, -7, -3, 1, ...

1 - (-3) = 4,-3 - (-7) = 4,-7 - (-11) = 4

The difference is common, so the sequence is an AP.

The nth term is:

$a_n=a_1+(n-1)d$$a_n=-11+(n-1)*4=-11+4n-4=4n-15$

Find the 52nd term:

$a_{52}=4*52-15=208-15=193$

Question 35

Find the 52nd term using the given formula:

$a_{52}=-30-4*52=-30-208=-238$

Find the previous term:

$a_{51}=-30-4*51=-30-204=-234$

Find the common difference:

$d=a_{52}-a_{51}=-238-(-234)=-4$

Answer:

$\begin{aligned}\textsf{34)} \quad d&=4\\a_n&=4n-15\\a_{52}&=193\end{aligned}$

$\begin{aligned}\textsf{35)} \quad d&=-4\\a_{52}&=-238\end{aligned}$

Step-by-step explanation:

Question 34

An arithmetic sequence is a sequence of numbers in which the difference between consecutive terms is constant.

Given sequence:

-11, -7, -3, 1, ...

To determine if the given sequence is arithmetic, calculate the differences between consecutive terms.

$a_4-a_3=1-(-3)=4$

$a_3-a_2=-3-(-7)=4$

$a_2-a_1=-7-(-11)=4$

As the differences are constant, the sequence is arithmetic, with common difference, d = 4.

The explicit formula for an arithmetic sequence is:

$\boxed{a_n=a+(n-1)d}$

where:

a is the first term of the sequence.n is the position of the termd is the common difference between consecutive terms.

To find the explicit formula for the given sequence, substitute a = -11 and d = 4 into the formula:

$\begin{aligned}a_n&=-11+(n-1)4\\&=-11+4n-4\\&=4n-15\end{aligned}$

To find the 52nd term, simply substitute n = 52 into the formula:

$\begin{aligned}a_{52}&=4(52)-15\\&=208-15\\&=193\end{aligned}$

Therefore, the 52nd term is a₅₂ = 193.

$\hrulefill$

Question 35

Given explicit formula for an arithmetic sequence:

$a_n=-30-4n$

To find the common difference, we need to compare it with the explicit formula for the nth term:

$\begin{aligned}a_n&=a+(n-1)d\\&=a+dn-d\\&=a-d+dn\end{aligned}$

The coefficient of the n-term is -4, therefore, the common difference is d = -4.

To find the 52nd term, simply substitute n = 52 into the formula:

$\begin{aligned}a_{52}&=-30-4(52)\\&=-30-208\\&=-238\end{aligned}$

Therefore, the 52nd term is a₅₂ = -238.

A triangular bandana has an area of 78 square inches. The height of the triangle is 9 3 4 inches. Enter and solve an equation to find the length of the base of the triangle. Use b to represent the length of the base. An equation to find the length of the base of the triangle is 78= The length of the base of the triangle is inches.

Answers

Area of triangle = 1/2 x base x height:

78 = 1/2 x base x 9 3/4

Multiply both sides by 2:

156 = base x 9 3/4

Divide both sides by 9 3/4:

Base = 16 inches

In a normal distribution, 68% of the data fall within how many standard deviations of the mean? O A. Two standard deviations O B. One standard deviation O C. It cannot be determined from the given information. D. Three standard deviations

Answers

Answer:

B. One standard deviation

In a normal distribution, approximately 68% of the data fall within one standard deviation of the mean because of the empirical rule, also known as the 68-95-99.7 rule. This rule states that in a normal distribution, about 68% of the data values will fall within one standard deviation of the mean, about 95% will fall within two standard deviations of the mean, and about 99.7% will fall within three standard deviations of the mean.

There are 5,375 pencils in 25 cases. Find the unit rate. pls

Answers

Answer:

5,375/25= 215 pencils per case

Step-by-step explanation:

Answer: 215 Pencils are in each case

Step-by-step explanation:

5,375/25 equals the unit rate

Mina opens a book 15 times and records whether the page number is
even or odd. How many trials did she conduct?

Answers

Answer:

She made 15 trials

Step-by-step explanation:

Well it said that she opened the book 15 times in total and records each time so the answer would be 15.

Mina conducted 15 trials in total.

What are trials? What is probability? In probability theory, an experiment or trial is any procedure that can be infinitely repeated and has a well-defined set of possible outcomes, known as the sample spaceThe formula to calculate the probability of occurrence of an event [A] can be written as -

P(A) = n(A)/n(S)

where -

n(A) = Number of outcomes favorable to event A.

n(S) = Total number of outcomes.

We have Mina opens a book 15 times and records whether the page number is even or odd.

Since she opens the book 15 times, she conducted 15 trials in total.

Therefore, Mina conducted 15 trials in total.

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The question is in the picture.

Answers

Easy way to do this, divide 24 with 3, you will get 8. That means 8 is 1/3 of 24. To get 2/3 you just add 8+8 which equals to 16

A random sample of n = 45 observations from a quantitative population produced a mean x = 2.5 and a standard deviation s = 0.26. Your research objective is to show that the population mean μ exceeds 2.4. Calculate the p-value for the test statistic z = 2.58. (Round your answer to four decimal places.)

Answers

Answer:

P-value (t=2.58) = 0.0066.

Note: as we are using the sample standard deviation, a t-statistic is appropiate instead os a z-statistic.

As the P-value (0.0066) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the population mean μ exceeds 2.4.

Step-by-step explanation:

This is a hypothesis test for the population mean.

The claim is that the population mean μ exceeds 2.4.

Then, the null and alternative hypothesis are:

$H_0: \mu=2.4\\\\H_a:\mu> 2.4$

The significance level is 0.05.

The sample has a size n=45.

The sample mean is M=2.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=0.26.

The estimated standard error of the mean is computed using the formula:

$s_M=\dfrac{s}{\sqrt{n}}=\dfrac{0.26}{\sqrt{45}}=0.0388$

Then, we can calculate the t-statistic as:

$t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{2.5-2.4}{0.0388}=\dfrac{0.1}{0.0388}=2.58$

The degrees of freedom for this sample size are:

$df=n-1=45-1=44$

This test is a right-tailed test, with 44 degrees of freedom and t=2.58, so the P-value for this test is calculated as (using a t-table):

$P-value=P(t>2.5801)=0.0066$

As the P-value (0.0066) is smaller than the significance level (0.05), the effect is significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the population mean μ exceeds 2.4.

I really need help on this

Answers

Answer:

Step-by-step explanation:

The file below is a picture of the answer. I didn't want to type it out : /

$5(x + 8) \ \textless \ 75$i don't no how to do this

Answers

Answer:

x < 7

Explanation:

The initial inequality is:

5(x + 8) < 75

First, we need to divide both sides by 5, so:

$\begin{gathered} \frac{5(x+8)}{5}<\frac{75}{5} \\ x+8<15 \end{gathered}$

Then, subtract 8 from both sides:

x + 8 - 8 < 15 - 8

x < 7

So, the solution to the inequality is x < 7

What is the answer to 30=-(7-x)?

Answers

Step-by-step explanation:

$x = \frac{30}{7} $

Answer:

x = 37.

Step-by-step explanation:

125x ^ 3 - 27 = 0
Solve this by grouping

Answers

The solution to the equation 125x³ - 27 = 0 is (5x−3)(25x ^2 +15x+9)

What is an equation?

An equation is a mathematical expression that contains an equals symbol. Equations often contain algebra. Algebra is used in mathematics when you do not know the exact number in a calculationsolving the equation 125x³ - 27 = 0 by grouping

Rewriting 125x^ 3 −27 as (5x) ^3 −3³

The difference of cubes can be factored using the rule:: a ^3 −b^ 3 =(a−b)(a^ 2 +ab+b^ 2 )

Polynomial 25x^ 2 +15x+9 is not factored since it does not have any rational roots.

Hence, (5x−3)(25x ^2 +15x+9)

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Determine the value of x and y

Answers

Answer:

x=65, y=60

Step-by-step explanation:

x=65--->corrosponding angles with the triangle

x+y+55=180--->linear pair

(65)+y+55=180

y=60

Answer:

x=65 y=60

Step-by-step explanation:

Well, divide the hypotenuse between two triangles added onto the square root of the divisions between Mars and Pluto and we can derive the positive neutrons of the seventeenth quadratic of the Einstein constant equation.

or, know that x=65 due to it being on a parallel line to it, then due to their being 360 degrees around a point, 65+65+55+55=240, 360-240=120, then divide that by two to get it at y.

jackie and phil have two fair coins and a third coin that comes up heads with probability 4/7 . jackie flips the three coins, and then phil flips the three coins. let m/n be the probability that jackie gets the same number of heads as phil, where m and n are relatively prime positive integers. find m +n

Answers

Here m/n be the probability of 123/392, where m is 123 and n is 392, so the m+n is 515

Here considering xⁿ to be the flipping heads of n numbers , so the generating functions for these coins are (1+x)(1+x)(3+4x) order, so the product those orders we get ,

(1+x)*(1+x)*(3+4x)= 4x^3+11^2+10x+3 ,here axⁿ means the n number of ways to get n number of head .Now the square of the sum of the coefficient is (4+11+10+3)²= 28^2 =784, and the sum of the square of each coefficient is(4²+11²+10²+3²)= 246.The probability will be: 246/784=123/392 =123+392 = 515

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find the measure of angle 1
8x-4 and 6x+8
A. 136 degrees
B. 28 degrees
C. 44 degrees
D. 6 degrees

Answers

Answer:

c) 44°

Step-by-step explanation:

the angles labeled '8x-4' and '6x+8' are equal because they are corresponding; we can solve for 'x' by setting them equal to each other

8x - 4 = 6x + 8

2x - 4 = 8

2x = 12

x = 6

substitute 6 for 'x' in '6x+8'

6(6) + 8 = 36 + 8 = 44°

Make sure the answer is 100% correct. Then circle the answer in a circle.

Answers

Answer:
False
Any integers that the numbers 5, 10 , 15 but 20 can be used as a counter argument against the statement.

Step-by-step explanation:

The claim is that A⊆B which stands for that A is a SUBSET in B, or that B contains A.

The truth is that B⊆A since 5 has more possible outcomes than 20 in the number of integers.
So the list of all possible answers are r5, r10, and r15 where N⊆Z.

For example I choose r=3 and r15, 3(15)= 45. I can use the number 45 as a counter argument that the statement of A⊆B is false.

Write an equation of the line that
passes through (-1,2) with a slope of 4

Answers

Step-by-step explanation:

Hey there!

Given;

The points is; (-1 , 2) and slope is 4.

Note: Use one-point formula.

$(y - y1) = m(x - x1)$

~ Put all values.

$(y - 2) = 4(x + 1)$

~ Simplify it.

$(y - 2) = 4x + 4$

$4x - y + 6 = 0$

Therefore, the required equation is; 4x-y+6=0.

Hope it helps...

x/5+7=3
tellme fastplease

Answers

Answer:

-20

Step-by-step explanation:

x/5=3-7

x/5=-4

x=-4×5

x=-20

Solve the system of equations - 6x + 8y = –10 and - 4x + y = –11 by
combining the equations.

Answers

Answer: (3, 1) :)

Explanation:
-6x + 8y = -10
-4x + y = -11
-32x + 8y = -88
26x = 78
x = 3
-18 + 8y = -10
8y = 8
y = 1

(Also, can I have brainliest please?)

What is the value of x? Round to the nearest thousandth.

Answers

Applying the tangent ratio, the value of x in the image, rounded to the nearest thousandth is: 15.824.

How to Find the Value of x Using the Tangent Ratio?

The tangent ratio, commonly referred to as "tangent," is a trigonometric function that relates the ratio of the length of the side opposite an angle to the length of the side adjacent to that angle in a right triangle. It is expressed as:

tan (∅) = opposite/adjacent

We have the following:

Reference angle (∅) = 53 degrees

Length of opposite side = 21

Length of adjacent side = x

Plug in the values:

tan 53 = 21/x

x * tan 53 = 21

x = 21 / tan 53

x = 15.824

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Question 2(Multiple Choice Worth 2 points)
(Slope-Intercept Form MC)

The table shown represents a linear relationship.

x 0 1 3 4
y −8 −6 −2 0

Based on the table, what is the equation of the linear relationship in slope-intercept form?
y = 2x − 8
y = 2x + 8
y = −2x + 4
y = −2x − 4

Answers

The equation of the linear relationship in slope-intercept form is y = 2x - 8. Option A is the correct answer.

To determine the equation of the linear relationship in slope-intercept form based on the table, we need to find the slope and y-intercept.

By observing the table, we can calculate the slope by selecting any two points. Let's choose the points (0, -8) and (4, 0).

Slope (m) = (change in y) / (change in x)

= (0 - (-8)) / (4 - 0)

= 8 / 4

= 2

Now that we have the slope, we can find the y-intercept by substituting the values of one point and the slope into the equation y = mx + b and solving for b.

Using the point (0, -8):

-8 = 2(0) + b

b = -8

Therefore, the equation of the linear relationship in slope-intercept form is: y = 2x - 8. Option A is the correct answer.

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Part D
Now use GeoGebra to measure the lengths of segments AB and BC and calculate the area of rectangle ABCD. Do you get the same result that you obtained in part C? Take a screenshot with the lengths of the sides labeled and the area displayed, and paste it below.

Answers

Answer:

id ont givea

efijhaoieuvbhzoiubhoewivbawzoufhbealivjhbr

Step-by-step explanation:

idsifui piuh vSeth is using the figure shown below to prove Pythagorean Theorem using triangle similarity:

In the given triangle ABC, angle A is 90° and segment AD is perpendicular to segment BC.

The figure shows triangle ABC with right angle at A and segment AD. Point D is on side BC.

Which of these could be a step to prove that BC2 = AB2 + AC2?Seth is using the figure shown below to prove Pythagorean Theorem using triangle similarity: