Please help I have 30 minutes or I fail this assignment no joke please answer all the questions there's only four.

The sampling distribution of sample means for a random sample of 40 dogs will be approximately normally distributed with a mean of 15 pounds and standard deviation of 4 pounds divided by the square root of 40.

This is due to the central limit theorem, which states that as the sample size increases, the distribution of sample means approaches a normal distribution regardless of the shape of the population distribution. In this case, the large enough sample size (n=40) will allow us to assume normality for the sampling distribution of sample means.
The standard deviation of the sampling distribution (also known as the standard error) is calculated by dividing the population standard deviation by the square root of the sample size. In this case, the standard error is  \(\frac{4}{\sqrt{40}} = 0.632\).
Therefore, option C is the correct answer. Option A is incorrect because the sampling distribution is not necessarily strongly skewed right, as the central limit theorem will cause the distribution to approach normality. Option B is incorrect because the standard deviation of the sampling distribution is not 0.632 pounds, but rather the standard error is 0.632 pounds. Option D is incorrect because the standard deviation of the sampling distribution is not the same as the standard error.

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Answer:

C= 65.5°

D= 114.1°

Step-by-step explanation:

5x - 6 + 7x +14 = 180

5x + 7x + 14 - 6 = 180

12x + 8 = 180

- 8 - 8

12x = 180

12x/12 = 180/12

x = 14.3

C= 5x - 6

5(14.3)-6

71.5 - 6

C=65.5°

D= 7x + 14

7(14.3) + 14

100.1 + 14

D= 114.1°

65.5 + 114.1 = 179.6°

When this is rounded up, you will get 180°

Hope this helps!

Answer:

6

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

Thales’ theorem: 4/12=2/x => 4x = 24 => x = 24/4=6

Answer5.5:

Step-by-step explanation:

Divided 16.50 by 3

Answer:

5.50

Step-by-step explanation:

16.50 divided by 3 5.50

Answer:

13ft

Step-by-step explanation:

Kindly find attached a rough draft of the situation.

Step one:

Given data

The length of the slide represents the

Hypotenuse of the situation on the rough sketch

Angle =33°

Required

The height of the ladder which is the adjacent of the rough sketch represented by x

Step two:

Applying SOH CAH TOA

Cos θ= adj/hyp

Cos 33=x/15

0.84=x/15

Cross multiplying

x=0.84*15

x=12.6

To the nearest foot the ladder is 13ft tall

Answer:

30 Bricks in the 6th row

Step-by-step explanation:

i found the answer online

Answer:

b: 30

Step-by-step explanation:

took test

Answer:

a = - 4

Step-by-step explanation:

Assuming you require to find the value of a

Given (x + h) is a factor of f(x) then f(- h) = 0

Here f(x) = x³ + ax² - 29x + 12 and h = - 4 , then

(- 4)³ + a(- 4)² - 29(- 4) + 12 = 0

- 64 + 16a + 116 + 12 = 0

16a + 64 = 0 ( subtract 64 from both sides )

16a = - 64 ( divide both sides by 16 )

a = - 4

The factor of an equation means that the factor value must give the equation zero.

If x + 4 is a factor of the equation  x³ + ax² - 29x + 12

The value of a is -4.

Solutions are the values of an equation where the values are substituted in the variables of the equation and make the equality in the equation true.

We have,

x³ + ax² - 29x + 12 ______(1)

We need to find the value of a when x + 4 is a factor of equation (1).

If x + 4 is a factor then the x³ + ax² - 29x + 12 must be zero when x + 4 = 0.

This means,

x + 4 = 0

x = -4

Substituting x = -4 in (1) we must get zero.

Now,

x³ + ax² - 29x + 12 at x = -4.

(-4)³ + a(-4)² - 29x(-4) + 12 = 0

-64 + 16a + 116 + 12 = 0

16a + 64 =

16a = -64

a = -4

Thus,

The value of a when x+ 4 is a factor of x³ + ax² - 29x + 12 is -4.

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Answer:

(-2,6)

Step-by-step explanation:

the actual solution to the system of equations is (-(64/27),(56/9)).

however, we can estimate by looking at the graph. the solution is where both lines intersect, and that looks to be around (-2,6) as an approximation. hope this helps!

Answer:

0

Step-by-step explanation:

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

so m= (3-3)/(2-10)

m=0/-8

since 0 divided by anything is 0, the answer is 0

We cannot conclude that listening to Mozart will lead to much higher scores on an IQ test based on the given information.

While the mean IQ scores were 1.2 points higher after listening to Mozart, the statistical significance of this difference depends on the chosen level of significance (alpha level) and the sample size. The p-value of 0.0004 indicates that if there is no difference in IQ scores between the Mozart and silent background conditions in the population, there is only a 0.04% chance of observing a sample mean difference of 1.2 points or larger. However, we would need to know the alpha level and sample size used in the study to determine if this is statistically significant at a practical level. Additionally, this experiment only shows a correlation between listening to Mozart and higher IQ scores, and cannot prove causation.

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Answer:

1/4 ^4 or 0.25 ^4

Step-by-step explanation:

Well..you could be a bit more specific, but I'll assume you mean square?

It would be 1/4 ^4 or 0.25 ^4.

It just reads one-fourth to the power of four.

Hope that is the answer needed?

Answer:

1/4 x 1/4 x 1/4 x 1/4

Step-by-step explanation:

There are 2.25 distinct 2-colored necklaces of length 4, up to rotation. Since we cannot have a fractional number of necklaces, we round up to get a final answer of 3.

A necklace is made by stringing together beads in a circular shape. A 2-colored necklace is a necklace where each bead is painted either black or white. How many distinct 2-colored necklaces of length 4 are there? Two colorings are considered identical if they can be obtained from each other by rotation.Let's draw a table to keep track of our count:Each row in the table represents one way to color the necklace, and each column represents a distinct necklace.

For example, the first row represents a necklace where all the beads are black, and each column represents a distinct rotation of that necklace.We start by counting the necklaces where all the beads are the same color. There are 2 of these. We then count the necklaces where there are 2 beads of each color. There are 3 of these.Next, we count the necklaces where there are 3 beads of one color and 1 bead of the other color. There are 2 of these, as we can start with a black or white bead and then rotate.

Finally, we count the necklaces where there are 2 beads of one color and 2 beads of the other color. There are 2 of these, as we can start with a black or white bead and then rotate. Thus, there are a total of 2 + 3 + 2 + 2 = 9 distinct 2-colored necklaces of length 4, up to rotation.  Answer: 9There is a better algebraic way to do this without finding all cases: Using Burnside's lemma. Burnside's lemma states that the number of distinct necklaces (up to rotation) is equal to the average number of necklaces fixed by a rotation of the necklace group. The necklace group is the group of all rotations of the necklace.

The average number of necklaces fixed by a rotation is the sum of the number of necklaces fixed by each rotation, divided by the number of rotations.For a necklace of length 4, there are 4 rotations: no rotation (identity), 1/4 turn, 1/2 turn, and 3/4 turn. Let's count the number of necklaces fixed by each rotation:Identity: All necklaces are fixed by the identity rotation. There are 2^4 = 16 necklaces in total.1/4 turn: A necklace is fixed by a 1/4 turn rotation if and only if all beads are the same color or if they alternate black-white-black-white.

There are 2 necklaces of the first type and 2 necklaces of the second type.1/2 turn: A necklace is fixed by a 1/2 turn rotation if and only if it is made up of two pairs of opposite colored beads. There are 3 such necklaces.3/4 turn: A necklace is fixed by a 3/4 turn rotation if and only if it alternates white-black-white-black or black-white-black-white. There are 2 necklaces of this type.The total number of necklaces fixed by all rotations is 2 + 2 + 3 + 2 = 9, which is the same as our previous count. Dividing by the number of rotations (4), we get 9/4 = 2.25.

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Answer:

m= -29

Step-by-step explanation:

This is a bit of a complex equation, but let's work through it.

2/3 (m-1/2) +3= m/3-7

First, we need to distribute the 2/3.

(2/3)(m)+(2/3)(−1/2)+3=m/3+−7

Now we simplify that.

2/3m+−1/3+3=1/3m+−7

We can now combine like terms.

2/3m+8/3=1/3m+−7

The goal is to isolate the variable, so we should subtract 1/3m from both sides.

1/3m+8/3=−7

Lets keep going! We can subtract 8/3 from both sides.

1/3m=-29/3

Well now we know what 1/3 of m is, but we want to know what m is. So we can multiply both sides by three to finally find out what m is!

m=-29

We did it! m=-29

Answer:

we can find the X and the Y than draw it in the graphic

3x-1=3-x

x=1

y=3-1=2

so the y its 2 and x 1

(1,2)

Answer:

5Cause 15 divided by 3 is five

Step-by-step explanation:

p=9

p=3

p-9=0

p-3=0

(p-9)(p-3)=0

p*2-3p-9p+27=0

p*2-12p+27=0

Answer:

Yes

Step-by-step explanation:

8/10 can be simplified to become 3/4

Answer:

114 cm²

Step-by-step explanation:

Mah teacher help me do this lol

Answer:

A1=4m*12m=48m^2

A2=6m*3m=18m^2

A3=A1

therefore A1+A2+A3=114m^2

The regression line is the line that minimizes error in predicting scores on the dependent variable.

Regression analysis is a statistical technique used to model the relationship between a dependent variable and one or more independent variables. The regression line is a straight line that best fits the data and is used to make predictions about the dependent variable based on the values of the independent variable(s).

The line is called the regression line because it is used to estimate the regression equation, which represents the relationship between the variables.

The regression line is determined by minimizing the sum of the squared differences between the observed values of the dependent variable and the predicted values of the dependent variable based on the independent variable(s). In other words, the line is chosen to minimize the error in predicting the values of the dependent variable.

This is why the regression line is also known as the line of best fit or the least squares line.

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Step-by-step explanation:

The composition of two functions, f and g, is denoted as (f.g)(x) and is given by:

(f.g)(x) = f(g(x))

For the given functions f(x) = 2x - 3 and g(x) = 3x - 1, we have:

(f.g)(x) = f(g(x)) = f(3x - 1) = 2(3x - 1) - 3 = 6x - 5

So the composition of f and g is (f.g)(x) = 6x - 5.

\(R^2\) measures the proportion of the variance in the dependent variable (wage) that can be explained by the independent variables (exper and \(exper^2\)) in the regression model.

In this case, the given \(R^2\) value is 0.011, which means that approximately 1.1% of the variance in wages can be explained by the years of experience (exper) and its squared term (\(exper^2\)) included in the regression model.

\(R^2\) ranges between 0 and 1, where 0 indicates that none of the variance in the dependent variable is explained by the independent variables, and 1 indicates that all the variance is explained. A low \(R^2\) value suggests that the independent variables have limited explanatory power in predicting the wages of individuals.

In conclusion, the given \(R^2\) value of 0.011 indicates that only a small proportion of the variation in wages can be attributed to the years of experience and its squared term in the regression model.

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To study the effect of elevation above sea level on air temperature and air pressure while hiking from Heart Lake (elevation 2,179 feet) to the peak of Mt. Marcy (elevation 5,344 feet) in the Adirondack Mountains, the students should use the following instruments to collect their data:

1. Thermometer: A thermometer is an instrument used to measure air temperature. The students should take temperature readings at various elevations during their hike to determine the relationship between elevation and temperature.

2. Barometer: A barometer is an instrument used to measure air pressure. The students should take air pressure readings at various elevations during their hike to determine the relationship between elevation and air pressure.

By using these two instruments and comparing the data collected at different elevations, the students can study the effect of elevation on air temperature and air pressure.

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Answer:

-49

Step-by-step explanation:

Hope this helps

PLZZ MARK BRAINLIEST

Revised probabilities: Bruk - 0.2748, Alemayehu - 0.4533, Yohannes - 0.2719 (order filled correctly), Bruk - 0.4743, Alemayehu - 0.4269, Yohannes - 0.0988 (order filled incorrectly).

If the order was filled correctly and the person who filled it is unknown, the revised probabilities that Bruk, Alemayehu, or Yohannes filled the order can be calculated based on their individual error rates and the proportion of orders they fill.

The probability that Bruk filled the order correctly would be 0.8 (1 - 0.2) * 0.3 = 0.24.

The probability that Alemayehu filled the order correctly would be 0.88 (1 - 0.12) * 0.45 = 0.396.

The probability that Yohannes filled the order correctly would be 0.95 * 0.25 = 0.2375.

Therefore, the revised probabilities are approximately 0.2748 for Bruk, 0.4533 for Alemayehu, and 0.2719 for Yohannes

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The expression that represents the correct translation of the phrase is 8x = x + 2

An equation is an expression that shows the relationship between two or more numbers and variables.

Independent variables represent function inputs that do not depend on other values, while dependent variables represent function outputs that depends on other values.

Let x represent the unknown number, the product of 8 and a number is equal to the number increased by 2, hence:

8 * x = x + 2

8x = x + 2

The expression that represents the correct translation of the phrase is 8x = x + 2

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Answer:

32

Step-by-step explanation:

In ΔLMK

short leg /long leg = 18/24

In ΔLMJ

short leg /long leg = 24/JK

Now we make them equal

(18/24) = (24/JK), cross multiply

  18·JK = 24², divide both sides by 18

      JK = 24²/18

     JK = 32

Answer:

The balance of  the odds must be for spins of different colours. Therefore, 81/81 - 29/81, the odds of getting two different colours.

Answer

Anita's total number of dolls = 30

Explanation

Let the total number of dolls be x

20% of x = 6

0.2x = 6

Divide both sides by 0.2

(0.2x/0.2) = (6/0.2)

x = 30 dolls

Hope this Helps!!!

The percentage error is 11.1%

Percent error is the difference between estimated value and the actual value in comparison to the actual value and is expressed as a percentage

error = estimated value - actual value

estimated value = 18 feet, Actual value = 16 feet

Error = 18 - 16

error = 2 feet

percentage error = error/estimated x 100%

percentage error = 2/18 x 100

percentage error = 200/18

percentage error = 11.1%

In conclusion, the percentage error is 11.1%

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