a researcher found that out of 100 boys, 56 had dogs in their household, while only 43 out of 100 girls did. she plans to compute a confidence interval for the difference in proportions. compute the standard error to use in this formula.

Answer:

The distance between points A and D is 9 units.

The distance between points E and F is approximately 7.28 units.

Step-by-step explanation:

Step-by-step explanation:

sine and cosine have a full cycle every 180° or pi (as the full circle is 360° or 2pi).

cosine starts with the value 1 (for theta = 0), goes to 0 for 90° or pi/2, then to -1 for 180° or pi, then again to 0 for 270° or 3pi/2. and back to 1 for 360° or 2pi.

and the next cycle begins ...

so,

cos(theta) = 0 for

theta = pi/2 and 3pi/2

Comparing using volume , The party store can 27 more smaller party hats on the shelf than larger party hats.

A cone is a three-dimensional geometric shape that tapers smoothly from a circular base to a point called the apex or vertex. It has a curved surface that extends from the base to the vertex and a circular base that is perpendicular to the axis of the cone.

We need to compare the number of smaller party hats that can fit on the shelf to the number of larger party hats that can fit on the same shelf. Since the hats are in the shape of cones, we need to use the formula for the volume of a cone to calculate their sizes.

The volume of a cone can be calculated using the formula:

[tex]V = \frac{1}{3}\pi r^2h[/tex]

where V is the volume, r is the radius of the base, h is the height of the cone, and π is the mathematical constant pi (approximately equal to 3.14).

Let's assume that the larger party hats have a radius of 1.5 feet and a height of 3 feet, while the smaller party hats have a radius of 1 foot and a height of 2 feet.

The volume of a larger party hat is:

[tex]V_1 = \frac{1}{3}\times\pi\times (1.5 ft)^2\times(3 ft) =3.14 ft^3[/tex]

The volume of a smaller party hat is:

[tex]V_2 = \frac{1}{3}\times\pi\times (1 ft)^2\times(2 ft) =0.21 ft^3[/tex]

The total volume of the shelf is 6 feet long and its cross-section is a rectangle, so its volume is:

[tex]V_{shelf} = (6 ft)\times(1 ft)\times(1 ft) = 6 ft^3[/tex]

To find out how many larger party hats can fit on the shelf, we need to divide the volume of the shelf by the volume of a single large party hat:

[tex]n_1 =\frac{ V_{shelf}} { V_1} = 1.91[/tex]

To find out how many smaller party hats can fit on the shelf, we need to divide the volume of the shelf by the volume of a single small party hat:

[tex]n_2 =\frac{ V_{shelf}}{ V2} = 28.57[/tex]

Rounding to the nearest whole number, we get:

n1 = 2

n2 = 29

Therefore, the party store can fit 29 - 2 = 27 more smaller party hats on the shelf than larger party hats.

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Answer: so there are two party hats, one is smaller with a radius of 4 inches and a volume of 100.5 cubic inches. The other one is larger with a radius of 6 inches and a volume of 209.4 cubic inches.

First, let's find out how many of the larger party hats can fit on the shelf. The shelf is 6 feet long, which is 72 inches long. We're gonna divide the length of the shelf by the length of the larger party hat.

So, for the larger party hat, the height is 6 inches, and the radius is 6 inches. The formula to find the volume of a cone is V = (1/3) * π * r^2 * h. Plugging in the values, we get V = (1/3) * 3.14 * 6^2 * 6 = 452.16 cubic inches.

To find out how many of the larger party hats can fit on the shelf, we'll divide the length of the shelf by the length of the larger party hat. 72 inches divided by 6 inches gives us 12.

So, 12 of the larger party hats can fit on the shelf.

Now, let's do the same for the smaller party hat. The height is 8 inches, and the radius is 4 inches. Using the same formula, V = (1/3) * 3.14 * 4^2 * 8 = 134.19 cubic inches.

To find out how many of the smaller party hats can fit on the shelf, we'll divide the length of the shelf by the length of the smaller party hat. 72 inches divided by 8 inches gives us 9.

So, 9 of the smaller party hats can fit on the shelf.

Now, to find out how many more of the smaller party hats can fit on the shelf than the larger party hats, we subtract the number of larger party hats from the number of smaller party hats. 9 minus 12 gives us -3.

The result is negative, which means that we can't fit more smaller party hats than the larger ones. In fact, we can fit 3 fewer smaller party hats on the shelf than the larger ones.

Step-by-step explanation: I hope this helps.

Step-by-step explanation:

Vertical angles are equal soooo   1 and  3 are equal = 102 degrees

 then    1 plus 2  forma straight line = 180 degrees

    so 2 = 78 degrees

       then vertical angles again, 2 and 4 are equal = 78 degrees

To solve the problem, we need to subtract the cost of lunch from Avery's initial amount of money:

$25.69 - $10.50 = $15.19

Therefore, Avery had $15.19 in her wallet after buying lunch.

Step-by-step explanation:

You will need to find  two lengths of corresponding sides

LH =  sqrt 5

L'H' = sqrt(20)    which is four times larger than sqrt5

scale factor 4

Answer:

the answer for the equations is

[tex]x = - 11[/tex]

Answer:

Square: [tex]A = s^{2}[/tex]

Parallelogram: [tex]A = b x h[/tex]

Trapezoid: [tex]A = \frac{1}{2} xh x (base_{1} +base_{2})[/tex]

Triangle: [tex]A = \frac{1}{2} x b x h[/tex]

Answer:     Square:

    Parallelogram:

Square:

Parallelogram:

Trapezoid:

Triangle:

    Trapezoid:

       Triangle:

Step-by-step explanation:

Answer: 12 yards

Step-by-step explanation:

Melanie bought 12 yards of ribbon.

(1 yard = 3 feet)

The total cost to operate his car for the year is then the sum of his fixed costs and his variable costs, or $10,018.00.

Annual variable is measured or observed over a 12-month period.

The annual variable costs for Anwar Mabak is $7,200.00. This can be calculated by multiplying the total number of miles driven (22,500) by the cost per mile ($0.32).

Annual Variable Costs = 22,500 x $0.32

      = $7,200.00

The total cost to operate his car for the year is then the sum of his fixed costs and his variable costs, or $10,018.00.

Total Costs = Fixed Costs + Variable Costs

    = $2,818.00 + $7,200.00

    = $10,018.00

Anwar Mabak's variable costs are a direct result of the number of miles he drives during the year, since he pays a certain amount for each mile he drives. This is why his variable costs increase or decrease depending on the number of miles he drives.

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The margin of error if we want a 90% confidence interval for the true population mean age is calculated to be 1.62 years, therefore option (a) is correct.

We can use the formula for the margin of error:

Margin of error = z × (σ / √(n))

where z is the z-score for the desired level of confidence, σ is the population standard deviation, and n is the sample size.

For a 90% confidence interval, the z-score is 1.645. Substituting the given values, we get:

Margin of error = 1.645 × (9.84 / √(100)) = 1.62

Therefore, the margin of error is 1.62 years, which is option (a).

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The question that can be answered by finding 10 divided by 2 11/20 is "What is the simplified value of 10 divided by 2 11/20?" and the answer is "7 43/51".

A mixed number is a representation of both a whole integer and a legal fraction. In most cases, it denotes an integer that falls between any two whole numbers. Look at the illustration; it shows a fraction that is larger than 1 but less than 2 (see the given image). Therefore, it is a composite number.

The expression "10 divided by 2 11/20" can be simplified as a mixed number or fraction as follows:

10 divided by 2 11/20 = 10 ÷ (2 + 11/20)

= 10 ÷ (40/20 + 11/20)

= 10 ÷ (51/20)

= 10 × (20/51)

= 400/51

= 7 43/51 (in mixed number form)

Therefore, the question that can be answered by finding 10 divided by 2 11/20 is "What is the simplified value of 10 divided by 2 11/20?" and the answer is "7 43/51".

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Answer:

For the binomial with a degree of 35 it would be 2x35+4

For the monomial with a degree of 100 would be 5y100

Step-by-step explanation:

Step-by-step explanation:

See image

The measures of diabetes mellitus, coronary artery disease, and renal disease in study subjects represent the nominal level of measurement. This is because these measures are categorical in nature and cannot be ranked or ordered.

Nominal level of measurement is the simplest form of measurement which assigns a name or number to an attribute. The attributes can be classified into different categories or classes without any ranking.

Nominal level of measurement is commonly used in research to represent things like gender, race, marital status, religion, and so on. In this case, the attributes being measured are the different chronic diseases. These are categorical and cannot be ranked.

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Step-by-step explanation & Answer

f(x) = x² - 4x -5, factored is simply f(x) = (x - 5)(x + 1).

If you zero out f(x), namely 0=(x-5)(x+1), that simply gives you the zeros of 5 and -1.

Now, from ----- -1------0---------------------------------5,

Notice from -1 to 5, there are 6 units, and half of 6 is 3, so, the half-way is 3 units away from either zero.

We can get to the half-way point by -1 + 3, or 2, x = 2, that's where the vertex is at, but you already knew that, and of course the y-coordinate is at f(2) = (2)² - 4(2) - 5, which is -9, so the vertex is indeed at (2, -9).

Well, surely you can, simply use the zeros location, -1 and 5, and draw a bowl between them, with the bottom of the bowl at 2, -9.

Answer:

Step-by-step explanation:

125,000 x 16% = $20,000

(23%) 28,750 + (8%) 10,000 + (9%) 11,250 + (12%) 15,000 + (16%) 20,000 + (19%) 23,750 + (13%) 16,250 = $125,000

the answer would be b.

Answer:

The cost of an adult ticket is 7.

Step-by-step explanation:

4t + 21 = 49

    - 21 = 28

4t = 28

/4 = 7

t = 7

The equation of ellipse will be  [tex]\frac{(x-4)^{2} }{16 } + \frac{(y-5)^{2} }{9 } =1[/tex]

An ellipse is the locus of all those points in a plane such that the sum of their distances from two fixed points , which is a constant. Those fixed points are known as the foci in singular term focus. The fixed line is known as directrix and the constant ratio is called the eccentricity of ellipse.

The ellipse with vertices (0, 5) and (8, 5) and minor axis of length 6.

Now the midpoint is( [tex]\frac{0+8}{2}[/tex] , [tex]\frac{5+5}{2}[/tex] )

                                 ( 4, 5)

So the center is (4, 5)

The equation  of the ellipse is

[tex]\frac{(x-h)^{2} }{b^{2} } + \frac{(y-k)^{2} }{a^{2} } =1[/tex]   where b is the semi major axis and a is the semi minor axis.

where (h, k) is the center. Here it is ( 4, 5)

Here 2a= 6 and 2b=8

Hence, the equation of ellipse will be

 [tex]\frac{(x-4)^{2} }{16 } + \frac{(y-5)^{2} }{9 } =1[/tex]

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The number of electoral votes does the state of nevada have in the electoral college is 6 electoral votes.

Nevada will be having a total of 6 electoral votes in the electoral college. The number of electoral votes for each state is equal to the total number of its members in Congress, which will be including its representatives in the House of Representatives and its two senators.

Therefore, since Nevada has 4 members in the House of Representatives and 2 senators, the state has a total of 6 members in Congress, and hence it can be concluded that a total of 6 electoral votes will be there in the Electoral College.

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The correct interpretation of an odds ratio of 0.75 would be (a) If not exposed the outcome is less likely since the odds ratio is less than 1.

An odds ratio of less than 1 indicates a decreased odds of the outcome in the exposed group compared to the unexposed group. Specifically, an odds ratio of 0.75 suggests that the odds of the outcome occurring in the exposed group is 25% lower than the odds of the outcome occurring in the unexposed group.

Option b is incorrect as an odds ratio of 0.75 is not necessarily close to 0, and option c is incorrect because an odds ratio of 0.75 means that the odds of the outcome in the exposed group is lower than the unexposed group, not 75 times greater. Option d is also incorrect as a protective effect would be observed if the odds ratio were less than 1.

Therefore, the correct option is (a)  If not exposed the outcome is less likely since the odds ratio is less than 1.

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The given question is incomplete, the complete question is:

How do you interpret an odds ratio of 0.75? a) If not exposed the outcome is less likely since the odds ratio if less than 1 b) There is no difference between groups because the odds ratio is close to 0 c) If exposed the outcome is 75 times greater than for the unexposed. d) if exposed the outcome is 75 the odds of the outcome in the unexposed (there is a protective effect)

Answer:

Step-by-step explanation:

To find the bearing of the bushwalker's finishing position from his starting point, we can use trigonometry and the concept of bearings.

First, we can draw a diagram to visualize the bushwalker's journey:

        (9 km south)

              |

              |

 (Starting point)

        O-----|-------------------> (14 km east)

              |

              |

     (Finishing point)

Next, we can use the tangent function to find the angle between the bushwalker's starting point and finishing point:

tan θ = opposite / adjacent

In this case, the opposite side is 14 km (the distance traveled east), and the adjacent side is 9 km (the distance traveled south):

tan θ = 14 / 9

We can use a calculator or reference table to find that the angle θ is approximately 56.31 degrees.

However, this is not the bearing we are looking for. In the context of bearings, the bearing of a point is the angle measured clockwise from north to the line connecting the starting point and the point in question.

To find the bearing of the bushwalker's finishing point, we need to adjust the angle θ to take into account the fact that bearings are measured from north.

First, we can find the direction of the line connecting the starting point and finishing point. This line travels 14 km east and 9 km south, so it has a slope of -9/14. We can find the angle this line makes with the horizontal axis by taking the arctangent of the slope:

tan α = -9/14

α = -30.96 degrees

Note that we use a negative sign because the line slopes downwards (southward) from left to right.

Finally, we can add this angle to the angle θ we found earlier:

Bearing = 360 - (θ + 90 + α)

       = 360 - (56.31 + 90 + (-30.96))

       = 287.7 degrees

Therefore, the bushwalker's finishing position has a bearing of approximately 287.7 degrees from his starting point.

[tex] \bf{Answer }[/tex]

We can use trigonometry to find the bearing of the finishing position from the starting point.

Using the Pythagorean theorem, we can find the length of the hypotenuse:

c² = a² + b²

where c is the length of the hypotenuse, a is the distance traveled east (14 km), and b is the distance traveled south (9 km).

Substituting the given values, we get:

c² = (14 km)² + (9 km)²

c² = 196 km² + 81 km²

c² = 277 km²

c ≈ 16.67 km (rounded to two decimal places)

Now, we can use trigonometry to find the angle between the hypotenuse and the east direction.

tan(θ) = opposite/adjacent

where θ is the angle between the hypotenuse and the east direction, opposite is the distance traveled south (9 km), and adjacent is the distance traveled east (14 km).

Substituting the given values, we get:

tan(θ) = 9 km / 14 km

θ ≈ 32.47° (rounded to two decimal places)

Therefore, the bearing of the finishing position from the starting point is approximately 32.47° south of east. Alternatively, we can describe the bearing as 157.53° east of south (180° - 32.47°), or simply as southeast.

Answer:

Yes, Triangle CAB is congruent to triangle DAB by the SAS Congruence Theorem, so line segment BC is congruent to line segment BD. This means that line segment AB is a perpendicular bisector of line segment CD.

Answer:

1st option

Yes, Triangle CAB is congruent to triangle DAB by the SAS Congruence Theorem, so line segment BC is congruent to line segment BD. This means that line segment AB is a perpendicular bisector of line segment CD.

Answer:

(-3.5, 3.5)

Step-by-step explanation:

When reflected across the y-axis, the sign of the x will change to the opposite.

Our points (3.5, 3.5)

What is the location of the corner that reflects (3.5, 3.5) across the y-axis?

(-3.5, 3.5)

The probability that a rental car delivered to the firm will need a tune-up is 0.03% or 0.000306 and the probability that it came from agency 2 is 39.15% or 0.3915.

(a) Let P(A1), P(A2), and P(A3) be the probabilities that a rental car comes from agency 1, agency 2, and agency 3, respectively, and let P(T) be the probability that a rental car needs a tune-up. Then, using the law of total probability, we have:

P(T) = P(T|A1)P(A1) + P(T|A2)P(A2) + P(T|A3)P(A3)

P(T) = 0.05(0.0036) + 0.02(0.0006) + 0.02(0.0058)

P(T) = 0.00018 + 0.000012 + 0.000116

P(T) = 0.000306

Therefore, the probability that a rental car delivered to the firm will need a tune-up is 0.03% (or 0.000306 as a decimal).

(b) Using Bayes' theorem, we can calculate the conditional probability that a rental car came from agency 2 given that it needs a tune-up:

P(A2|T) = P(T|A2)P(A2) / P(T)

P(A2|T) = 0.02(0.0006) / 0.000306

P(A2|T) = 0.3915

Therefore, if a rental car delivered to the firm needs a tune-up, the probability that it came from agency 2 is 39.15% (or 0.3915 as a decimal).

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Hi! I'd be happy to help with your probability and statistics question. However, I need more information about the specific problem you are trying to solve. Please provide the details of the question or problem you need help with, and I will gladly assist you with a step-by-step explanation.

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Answer: F= 4

Step-by-step explanation:

rise over run!

-4 (from the run in the slope) plus 8 (your x axis) is 4

This two are characteristics of frequency tables

1. They can be used for quantitative data.

2. They can be used for qualitative data.

Frequency tables have the following characteristics:
1. They can be used for quantitative data:

Frequency tables display the number of occurrences of each value in a dataset, which is particularly useful when dealing with numerical or quantitative data.
2. They can be used for qualitative data:

Frequency tables can also be used for non-numerical or qualitative data, such as categories or groups, by counting the number of occurrences for each category.
4. No observation can fit into more than one class:

In a frequency table, each observation or data point is assigned to only one class or category, ensuring that there is no overlap between classes.

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Answer:

the area of the trapezoid is (3/2)x^2 + 2x square units.

Step-by-step explanation:

Let's use "x" to represent the height of the trapezoid. According to the problem, one base measures 5 feet more than the height, so we can use "x + 5" to represent the length of that base. The other base is one foot less than twice the height, so we can use "2x - 1" to represent the length of that base.

The area of a trapezoid is given by the formula:

Area = (1/2)(sum of the bases)(height)

Substituting the expressions for the bases and the height, we get:

Area = (1/2)(x + 5 + 2x - 1)(x)

Simplifying the expression inside the parentheses, we get:

Area = (1/2)(3x + 4)(x)

Expanding the expression, we get:

Area = (3/2)x^2 + 2x

the area of the trapezoid is (3/2)x^2 + 2x square units.