The purpose of statistical inference is to make estimates or draw conclusions about a _____. a. population based upon information obtained from the sample b. mean of the sample based upon the mean of the population c. sample based upon information obtained from the population d. statistic based upon information obtained from the population

Answer:

The first graph is (-8,1). The second graph has no solution. The third graph is (1,3). The last graph has infinite solutions. Taking the graphs from left to right.

Step-by-step explanation:

The solution of a graph is determined at where the two lines of the graph intersect. When there is no intersection, but there are two graphs, then there is no solution but when there is only one line in the graph, the graph has infinite solutions.

Answer:

Answer in image

Step-by-step explanation:

Graph 1: Graph 1 is matched with (-8,1) because it intersects the other line only once, and they intersect at (-8,1).

Graph 2: Graph 2 has no solution because the lines never intersect. They're Parallel, and parallel lines never intersect. (We can't conclude they are parallel, but since they do not intersect in the picture, they have no solution.)

Graph 3: Graph 3 is matched with 1 sol. (1,3) because the lines intersect once, and they intersect at (1,3).

Graph 4: Graph 4 is matched with infinitely many solutions because the two lines are the same line. They are on top of each other meaning that at any point on the graph they will always be intersecting.

-Hope this helped

The appropriate measure of variability for the given data is the IQR, and its value is 16.

Based on the given stem-and-leaf plot, which represents the scores earned in a flower-growing competition, we can determine the appropriate measure of variability for the data.

The stem-and-leaf plot shows the individual scores, and to measure the spread or variability of the data, we have two commonly used measures: the range and the interquartile range (IQR).

The range is calculated by subtracting the smallest value from the largest value in the dataset. In this case, the smallest value is 20, and the largest value is 65. Therefore, the range is 65 - 20 = 45.

The interquartile range (IQR) is a measure of the spread of the middle 50% of the data. It is calculated by subtracting the first quartile (Q1) from the third quartile (Q3). Looking at the stem-and-leaf plot, we can identify the quartiles. The first quartile (Q1) is 25, and the third quartile (Q3) is 41. Therefore, the IQR is 41 - 25 = 16.

In this case, both the range and the IQR are measures of variability, but the IQR is generally preferred when there are potential outliers in the data. It focuses on the central portion of the dataset and is less affected by extreme values. Therefore, the appropriate measure of variability for the given data is the IQR, and its value is 16.

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Answer:

I think its "Maria selected a multiple that is not the least of the common multiples"

Step-by-step explanation:

I think the real answer would be 30 because it the lowest number that they both share....

Answer: the answer is d, she selected a multiple that is not a least common multiple. The least common multiple is the number both sets of numbers share, which  would be 30.

Answer:

2/9

Step-by-step explanation:

1/3=3/9

5/9-3/9=2/9

Answer:

2/9

Step-by-step explanation:

1/3= 3/9

5/9 - 3/9 = 2/9

hope this helps

Step-by-step explanation:

please mark me as brainlest

A-The first line has a direction vector of ⟨-2, 1, 3⟩, b-the second line has parametric equations x(t) = -4 - 2t, y(t) = 2 + t, z(t) = 17 + 5t, c-the two lines intersect at the point (1, 3, 10), d-the angle formed is 15.2 degrees, and e- the equation containing both lines is -2x + 7y - 5z = -59.

What is direction vector ?

A direction vector, also known as a directional vector or simply a direction, represents the direction of a line, vector, or a linear path in three-dimensional space. It is a vector that points in the same direction as the line or path it represents.

a) The direction vector for the first line is given by ⟨-2, 1, 3⟩.

b) The parametric equations for the second line, written in terms of the parameter t, are x(t) = -4 - 2t, y(t) = 2 + t, z(t) = 17 + 5t.

c) To find the intersection point, we set the x, y, and z coordinates of both lines equal to each other and solve for s and t:

4 - 2s = -4 - 2t

-2 + s = 2 + t

1 + 3s = 17 + 5t

Solving this system of equations yields s = 3 and t = 1. Therefore, the two lines intersect at the point (1, 3, 10).

d) The angle formed at the intersection point is given by the angle between their respective direction vectors. Using the dot product, the angle θ can be found as cos(θ) = (⟨-2, 1, 3⟩ · ⟨-2, 1, 5⟩) / (|⟨-2, 1, 3⟩| |⟨-2, 1, 5⟩|), which simplifies to cos(θ) = 0.96. Taking the inverse cosine, we find θ ≈ 15.2 degrees.

e) To find the equation of the plane containing both lines, we can use the point-normal form of a plane equation. We choose one of the intersection points (1, 3, 10) and use the cross product of the direction vectors of the two lines as the normal vector. The equation of the plane is given by -2x + 7y - 5z = -59.

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The standard deviation needed to achieve a process capability index of 2.0 is 0.003 feet.

To calculate the required standard deviation to achieve a process capability index of 2.0, we need to use the following formula:

Process Capability Index (Cpk) = (Upper Specification Limit - Lower Specification Limit) / (6 * Standard Deviation)

In this case, the upper specification limit is 1.788 feet, the lower specification limit is 1.752 feet, and the process capability index (Cpk) is 2.0.

Let's plug in the values into the formula and solve for the standard deviation:

2.0 = (1.788 - 1.752) / (6 * Standard Deviation)

Rearranging the equation:

Standard Deviation = (1.788 - 1.752) / (6 * 2.0)

Standard Deviation = 0.036 / 12

Standard Deviation = 0.003

Therefore, the standard deviation needed to achieve a process capability index of 2.0 is 0.003 feet.

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The answer is -13k - 7

Answer:

1 - 3k - 8 + 10k

1 - 3k + 10k - 8

1 - 13k - 8

1 - 8 - 13k

-7 - 13k or -7 + (-13k)

The calculated value of x in the circle is 59

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

The circle

The measure of angle at the center of the circle is calculated as

Center = 2 * 31

So, we have

Center = 62

The sum of angles in a triangle is 180

So, we have

x + x + 62 = 180

This gives

2x = 118

Divide by 2

x = 59

Hence, the value of x is 59

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Answer:

its B

Step-by-step explanation:

pls do not listen to the other person

you have to add the tax so multiplying the two together instead of just adding them would get the same number

(also x+0.05x is literally 1.05x anyway)

hope this helps <3

Answer:

\((b^4)^2 = b^{8}\)

Step-by-step explanation:

Given

\((b^4)^2\)

Required

Simplify

In indices, we have:

\((a^m)^n = a^{m*n\)

So:

\((b^4)^2 = b^{4*2}\)

\((b^4)^2 = b^{8}\)

The required specific energy increases with increasing depth and the water surface profile will be rapidly varied.

To determine the type of water surface profile for different depths in the rectangular channel, we can use the concept of specific energy and Manning's equation.

The specific energy (E) is given by the equation:
E = y + (V² / (2g)) + (Sf * x)

Given values:
Width of the rectangular channel (b) = 2.45 m
Discharge (Q) = 2.83 m³/sec
Bed slope (Sf) = 0.003
Manning's roughness factor (n) = 0.015

For each depth, we can calculate the velocity (V) using Manning's equation and then determine the specific energy (E) using the equation mentioned above.

Depth 1 (y₁ = 1.52 m):

First, let's calculate the velocity (V₁) using Manning's equation:\(V_1 = (1/n) * (R_1^{2/3}) * (S_f^{(1/2)})\)

The hydraulic radius (R₁) can be calculated as:
R₁ = (b * y₁) / (b + 2y₁) = (2.45 * 1.52) / (2.45 + 2 * 1.52) ≈ 0.678 m

Substituting the values
\(V_1= (1/0.015) * (0.678 ^{2/3}) * (0.003^{1/2})\) ≈ 2.81 m/s

Now, let's calculate the specific energy (E₁) using the equation:
E₁ = y₁ + (V₁² / (2g)) + (Sf * x)

Substituting the values:
E₁ = 1.52 + (2.976² / (2 * 9.81)) + (0.003 * x)

The above expression shows, the specific energy increases with increasing depth, and the water surface profile will be rapidly varied.

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Given question is incomplete, the complete question is:
2.45-m wide rectangular channel with a discharge of 2.83 m³/sec. has a bed slope of 0.003 and Manning's roughness factor of 0.015. What is the type of water surface profile for depths of 1.52 m, whether it is rapidly varied or not?

An ensemble approach called bagging combines the predictions from all models after fitting each one to a distinct portion of a training dataset.

When the standard deviation is low, the data tend to cluster around the mean; when it is large, the data are more spread. Calculated using the standard deviation, the data's divergence from the mean value is determined. It is useful for contrasting data sets with possibly the same mean but a distinct range. For instance, the mean of the two following numbers is the same: 15, 15, 15, 14, 16 and 2, 7, 14, 22, 30. But it's clear that the second is more diffused. The standard deviation shows how erratic the data is. It conveys the difference between each observed value and its mean.

given

An variation of bagging called random forest additionally randomly chooses the subsets of features that are applied to each data sample.

With the addition of splitting on a random subset of characteristics, random forest outperforms bagging by decorrelating the trees.

As a result, the model only takes into account a small subset of its properties at each branch in the tree rather than all of them.

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The system of equations in the graph is:

y = 2x + 3

y = (-0.5)*x - 3

Here we have a system of equations where we need to find the slopes of the two lines.

The system can be written as:

y = _x + 3

y = _x - 3

To find the slopes we can just use the given graph.

For the one with y-intercept at 3, we will get that for an increase of 1 unit in x, there is an increase of 2 units in y, then we have:

y = 2x + 3

And for the second line we can see that for an increase in x of 2 unit, there is a decrease of 1 unit in y, then:

y = (-0.5)*x - 3

The system is:

y = 2x + 3

y = (-0.5)*x - 3

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Answer:

Domain is all values of X or (-∞,∞)

Range is all the possible values of Y. Since it goes up to 3, and then it goes down, it's all values less than or equal to y, or (-∞,3] or y ≤ 3 (depending on how you need to enter the response.

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

Answer:

yes because the slopes are the negative reciprocal of eachother

Step-by-step explanation:

Looking at the given diagram, line AB is parallel to line CD. Given that angle 1 = 110 degrees,

angle 5 = angle 1 = 110 degrees

The reason is because they are corresponding angles. The angles lie on the same side of the transversal and their positions correspond.

Answer: a = 43°

Step-by-step explanation: If two angles are complementary,

then the sum of their measures is 90 degrees.

So we can setup the equation 47 + a = 90.

Now subtract 47 from both sides to get a = 43°.

The top of the ladder is moving down at a rate of 0.6 feet/second or approximately 16.8 feet/second when the foot of the ladder is 5 feet from the wall.

The crime rate at the end of May is rising by approximately 1080 crimes per month. The top of the ladder is moving down at a rate of 16.8 feet/second when the foot of the ladder is 5 feet from the wall.

To find how fast the crime rate is rising at the end of May, we need to calculate the derivative of the crime rate function with respect to time. The derivative of C(T) = T - 652 + 120 is dC/dT = 1. This means that the crime rate is rising at a constant rate of 1 crime per degree Fahrenheit.

At the end of May, the temperature is 72°F, and the rate at which the temperature is rising is 9°F per month. Therefore, the crime rate is rising at a rate of 9 crimes per month.

For the ladder problem, we can use similar triangles to set up a proportion. Let h be the height of the ladder on the building, and x be the distance from the foot of the ladder to the wall.

We have the equation x/h = 5/h.

Differentiating both sides with respect to time gives (dx/dt)/h = (-5/h²) dh/dt.

Given that dx/dt = 3 feet/second and x = 5 feet, we can substitute these values into the equation to find dh/dt.

Solving for dh/dt, we get dh/dt = (-5/h²)(dx/dt) = (-5/25)(3) = -3/5 = -0.6 feet/second.

Therefore, the top of the ladder is moving down at a rate of 0.6 feet/second or approximately 16.8 feet/second when the foot of the ladder is 5 feet from the wall.

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Answer:

TU = 27

Step-by-step explanation:

ST + TU = SU

(8x - 11) + (14x - 15) = 19x - 17

8x - 11 + 14x - 15 = 19x - 17

22x - 26 = 19x - 17

22x - 19x = 26 - 17

3x = 9

x = 3

TU = 14x - 15 = 14(3) - 15 = 27

The amount of flour in the bag is 4a + 32b

Mary used one big bag of flour to make her bread and muffin

She baked four loaves of bread

After making the four loaves of bread, Mary used the remaining flour in the bag to make the muffins

The amount of flour in the bag before Mary began can be calculated as follows

The amount of flour used to make Four loaves of bread= 4a

The amount of flour used to make 32 muffins= 32b

Total amount of flour in the bag before Mary began is= 4a + 32b

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The angle between the two vectors (4,1) and (-8,3) will be 145.4°.

It is defined as the quantity that has magnitude as well as direction also the vector always follows the sum triangle law.

It is possible to calculate the angle () between two vectors using the formula

\(\rm \theta = cos ^{-1} \frac{ (a.b)}{|a||b|}\)

Calculate dot product:

=a · b

= ax · bx + ay · by

= 4 · (-8) + 1 · 3

= - 32 + 3

= -29

=|a|

= √ax² + ay²

= √4² + 1²

= √16 + 1

= √17

=|b|

=√ bx² + by²

= √(-8)² + 3²

= √64 + 9

= √73

\(\rm \alpha = cos ^{-1} \frac{ (a.b)}{|a||b|}\)

α = 145.40771131249005°

Thus, the angle between the two vectors (4,1) and (-8,3) will be 145.4°.

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Answer/Step-by-step explanation:

When you have one or more parentheses inside a parentheses you change it to bracket so it is easier to tell which parentheses belongs to which.

Instead of ((-2+5)x4), it would be [(-2+5)x4]

It does not affect the answer

Answer: 56.548

Step-by-step explanation:  Circumfrance = (radius x pi) x2

Answer:

The answer is 56.57miles

Step-by-step explanation:

Answer:

5.20

Step-by-step explanation:

48 / 9.23 = 5.20043336945

rounded to tenth is 5.20

Hope This Helped

Answer:5.20

Step-by-step explanation:

48 / 9.23 = 5.20

The length of ED is approximately 36.75 units.

To find the length of ED, we can use the properties of similar triangles. Let's consider triangles ABC and ADE.

From the given information, we know that AC = 14, BC = 8, and AD = 21.

Since angle A is common to both triangles ABC and ADE, and angles BAC and EAD are congruent (corresponding angles), we can conclude that these two triangles are similar.

Now, let's set up a proportion to find the length of ED.

We have:

AB/AC = AD/AE

Substituting the given values, we get:

8/14 = 21/AE

Cross multiplying, we have:

8 * AE = 14 * 21

8AE = 294

Dividing both sides by 8:

AE = 294 / 8

Simplifying, we find:

AE ≈ 36.75

Therefore, the length of ED is approximately 36.75 units.

In triangle ADE, ED represents the corresponding side to BC in triangle ABC. Therefore, the length of ED is approximately 36.75 units.

It's important to note that this solution assumes that the triangles are similar. If there are any additional constraints or information not provided, it may affect the accuracy of the answer.

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Answer:

see attached photo for the graph

Answer:

2.5×10³

2.5×10×10×10

=2500

Answer:

2,500

Step-by-step explanation:

Move the decimal point 5 times to the right.