which sampling strategy is most commonly used in ethnography? group of answer choices purposive sampling cluster sampling stratified random sampling derivative sampling

In summary: Mean (μ): 120, Standard deviation (σ): 6.93, Minimum usual value (μ - 2σ): 106.14 and Maximum usual value (μ + 2σ): 133.86

To find the mean mu μ of the binomial distribution, we use the formula mu = n*p. Therefore, mu = 200*0.6 = 120.

To find the standard deviation sigma σ, we use the formula sigma = sqrt(n*p*(1-p)). Therefore, sigma = sqrt(200*0.6*0.4) = 6.93.

Using the range rule of thumb, we can estimate the minimum usual value by subtracting 2 times the standard deviation from the mean, and the maximum usual value by adding 2 times the standard deviation to the mean. Therefore, the minimum usual value is mu - 2*sigma = 120 - 2*6.93 = 106.14, and the maximum usual value is mu + 2*sigma = 120 + 2*6.93 = 133.86.

So, in summary, the mean mu μ of the binomial distribution is 120, the standard deviation sigma σ is 6.93, the minimum usual value mu minus 2 sigma μ−2σ is 106.14, and the maximum usual value mu plus 2 sigma μ+2σ is 133.86.
For a binomial distribution, the mean (μ) and standard deviation (σ) can be calculated using the formulas:

μ = n * p
σ = √(n * p * (1 - p))

Given n = 200 and p = 0.6, we can find μ and σ:

μ = 200 * 0.6 = 120
σ = √(200 * 0.6 * (1 - 0.6)) = √(200 * 0.6 * 0.4) = √48 ≈ 6.93

Next, we can use the range rule of thumb to find the minimum and maximum usual values:

Minimum usual value (μ - 2σ):
120 - (2 * 6.93) = 120 - 13.86 ≈ 106.14

Maximum usual value (μ + 2σ):
120 + (2 * 6.93) = 120 + 13.86 ≈ 133.86

In summary:
Mean (μ): 120
Standard deviation (σ): 6.93
Minimum usual value (μ - 2σ): 106.14
Maximum usual value (μ + 2σ): 133.86

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Answer:

4.5

Step-by-step explanation:

AB is similar to side BC, so to make a ratio, it would be 3/4=x/6. to solve, you cross multiply

The minimum value and median are used in the five-number summary.

A box and whisker plot displays a "box" with its left edge at Q₁, right edge at Q₃, "center" at Q₂ (the median), and "whiskers" at the maximum and minimum.

Given:

A five-number summary.

That means minimum value, lower quartile (Q1), median value (Q2), upper quartile (Q3), and maximum value.

From the given choices:

The minimum value and median are the required measures.

Therefore, the minimum value and median are the required measures.

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The smallest sample size n that provides the desired accuracy is 10.

To find the smallest sample size n that provides the desired accuracy, we can use the formula:

n = (Z-value * standard deviation / margin of error)²

Where:
Z-value = the critical value for the desired confidence level (in this case, 1.96 for 95% confidence)
Standard deviation = the preliminary sample standard deviation (1.5 in this case)
Margin of error = the desired accuracy (0.3 units in this case)

Substituting the values, we get:

n = (1.96 * 1.5 / 0.3)²
n = 9.8

Since we cannot have a fractional sample size, we round up to the nearest whole number, giving us:

n = 10

Therefore, the smallest sample size n that provides the desired accuracy is 10.

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Answer: 100 minutes.

Step-by-step explanation:

Make both equations equal each other:

39.99 + 0.45m = 44.99 + 0.40m

Wash out some of the clutter by finding combining like terms:

0.05m = 5

Now, divide by the coefficent of x:

\(\frac{0.05m}{0.05} = \frac{5}{0.05}\)

m = 100

If x and y satisfy the system of equations 4x + 5y = 9 and 9x + 1y = 10, then the value of (x + y) is 2.

Given the system of the linear equations are

4x + 5y = 9 ................. (i)

9x + y = 10 ............... (ii)

Now multiplying 5 with equation (ii) we get,

5(9x + y) = 5*10

45x + 5y = 50 ..................... (iii)

Subtracting equation (i) from equation (iii) we get,

(45x + 5y) - (4x + 5y) = 50 - 9

45x + 5y - 4x - 5y = 41

41x = 41

x = 41/41 = 1

Substituting x = 1 in equation (i) we get,

4 * 1 + 5y = 9

4 + 5y = 9

5y = 9 - 4 = 5

y = 5/5 = 1

So the solutions are x = 1 and y = 1.

Hence the value of x + y = 1 + 1 = 2.

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a. If the data is weight, the z-score for someone who is overweight would be positive.

b. If the data is IQ test scores, an individual with a negative z-score would have a low IQ.

c. If the data is time spent watching TV, an individual with a z-score of zero would watch the average amount of TV.

d. If the data is annual salary in the U.S and the population is all legally employed people in the U.S., the z-scores of people who make minimum wage would be negative.

The z-score represents how far a data point is from the mean in terms of standard deviations. If someone is overweight, their weight would be above the mean weight, so their z-score would be positive.

Again, the z-score represents how far a data point is from the mean in terms of standard deviations. If someone has a negative z-score for IQ test scores, it means their score is below the mean score, so their IQ would be low.

A z-score of zero means the data point is exactly at the mean, so someone with a z-score of zero for time spent watching TV would watch the average amount of TV.

Again, the z-score represents how far a data point is from the mean in terms of standard deviations. If someone is making minimum wage, their salary would be below the mean salary, so their z-score would be negative.

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The measure of angle x in the right triangle is approximately 14.6 degrees.

The figure in the image is that of two right angles.

First, we determine the hypotenuse of the left-right angle.

Angle θ = 30 degrees

Adjacent to angle θ = 10 cm

Hypotenuse = ?

Using the trigonometric ratio.

cosine = adjacent / hypotenuse

cos( 30 ) = 10 / hypotenuse

hypotenuse = 10 / cos( 30 )

hypotenuse = \(\frac{20\sqrt{3} }{3}\)

Using the hypotenuse to solve for x in the adjoining right triangle:

Angle x =?

Adjacent to angle x = \(\frac{20\sqrt{3} }{3}\)

Opposite to angle x = 3

Using the trigonometric ratio.

tan( x ) = opposite / adjacent

tan( x ) = 3 / \(\frac{20\sqrt{3} }{3}\)

tan (x ) = \(\frac{3\sqrt{3} }{20}\)

Take the tan inverse

x = tan⁻¹(  \(\frac{3\sqrt{3} }{20}\) )

x = 14.6 degrees

Therefore, angle x measures 14.6 degrees.

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Answer:

b) 2/3

Step-by-step explanation:

For a 6-sided die

total number of numbers: 6

numbers less than 2: 1

prime numbers: 2, 3, 5

total number of desired outcomes: 1 + 3 = 4

p(less than 2 or prime) = 4/6 = 2/3

Answer:

In this food sample testing lab, you will figure out who was guilty of the classroom food mess by determining which macromolecules are present in the mystery food sample.

Step-by-step explanation:

Answer:

In the mystery food sample, what macromolecules are present?

Step-by-step explanation:

Edge… you’re welcome.

Mark me brainliest please.

(a) Using the given data, we can verify the calculations as follows: ∑x = 245, ∑x^2 = 14,755, ∑y = 224.

(b) To compute the sample mean, variance, and standard deviation for the percentage success of mallard duck nests (x), we use the formulas:

Sample Mean (x) = ∑x / n

Variance (s^2) = (∑x^2 - (n * x^2)) / (n - 1)

Standard Deviation (s) = √(s^2)

(c) Applying the formulas, we can compute the sample mean, variance, and standard deviation for x as follows:

Sample Mean (x) = 245 / 5 = 49

Variance (s^2) = (14,755 - (5 * 49^2)) / (5 - 1) = 4,285

Standard Deviation (s) = √(4,285) ≈ 65.5

Similarly, for the percentage success of Canada goose nests (y), the calculations can be done using the same formulas and the given values from part (a).

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Explanation:

The leading term of a polynomial is the term with the largest exponent, which in this case that exponent is 4. So the leading term is -3x^4.

The leading coefficient is the coefficient of the leading term. The coefficient of the term -3x^4 is -3.

If the polynomial is written in standard form, then the process is as simple as reading the first coefficient. Otherwise, you may have to sort the terms out first.

Answer: x= 6

Step-by-step explanation:

Since the shape is a parallelogram, the angles will either be equal to each other or add up to 180.  

You can see they do not look the same so they add up to equal 180

12x + 3 +105 = 180

12x + 108 = 180

12x = 72

x = 6

Points, lines and planes can be used in different fields like Navigation, Architecture, Art, Engineering, etc.

What are points, lines, and planes?

Point: A point is a basic geometric object that represents a specific location in space.

Line: A line is a straight path that extends infinitely in both directions. It is made up of an infinite number of points that are all collinear, or lie on the same straight path.

Plane: A plane is a two-dimensional flat surface that extends infinitely in all directions.

Navigation: Points and lines are essential for navigation, both on land and in the air. For example, on a map, points represent specific locations, while lines represent roads, highways, and other paths that can be taken to get from one point to another.

Architecture and Design: Points, lines, and planes are critical for architecture and design. Architects use points to specify the locations of walls, columns, and other structural elements, while lines are used to create the edges of rooms and buildings. Planes are used to define the surfaces of walls, floors, and ceilings.

Art: Artists often use points, lines, and planes to create visual effects in their work. Points can be used to create texture, while lines can be used to create movement and depth. Planes can be used to create shapes and form.

Engineering: Points, lines, and planes are fundamental to engineering, which involves the design and construction of structures and machines. Engineers use points to specify the locations of components, while lines are used to create the edges of parts. Planes are used to define the surfaces of structures, such as the wings of an airplane.

Hence, points, lines and planes can be used in different fields like Navigation, Architecture, Art, Engineering, etc.

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Answer:

y+13 = 5(x+2)

Step-by-step explanation:

y = 5x – 3

This is in slope intercept form  y = mx+b so the slope is m which is 5

We have a slope and a point ( -2, -13)

Point slope form is

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

y - -13 = 5(x--2)

y+13 = 5(x+2)

Answer:

He is right

Step-by-step explanation:

I just took the quiz on edu

35 pounds is equivalent to 15.87 kg.

To convert pounds (lbs) to kilograms (kg), you can use the conversion factor of 0.45359237. Multiply the number of pounds by 0.45359237 to get the number of kilograms. In this case, 35 pounds multiplied by 0.45359237 is equal to 15.87 kg.

It's important to note that this conversion is based on the International System of Units (SI) and may not be the same in other systems of measurement. Also, it's important to remember that the pound (lbs) and kilogram (kg) are units of mass and should not be confused with other units of measurements such as length, area and volume.

It's important to use the correct unit of measurement for the task or the context, otherwise it could lead to errors and inaccurate results. Also, it's important to make sure that the measurements are made on the same scale, otherwise the conversions may not be accurate. Pounds are mostly used in the United States and United Kingdom, while kilograms is widely used in the rest of the world.

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A triangle having two equal sides and angles is known as an isosceles triangle. Its equal sides are 6 cm long and make a 75o angle with one another.

A triangle having two equal sides and angles is known as an isosceles triangle. The procedures listed below can be used to build an isosceles triangle with a length of 6 cm and an angle of 75o between the two equal sides:

1. Mark the midway of each of the two 6 cm-long equal lines.

2. Draw a line between the two mid points to create the triangle's base.

3. Beginning at one of the base line's ends, use a compass to draw a 75-degree arc.

4. Create a new arc of Starting from the other end of the base line, measure 75o with a compass.

5. The third corner of the triangle will be formed by the intersection of these arcs.

6. To finish the triangle, connect its three corners with straight lines.

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By making linear equations for given situation, the vendor sold 34 hot dogs and 84 sodas at the football game.

What is a linear equation, exactly?

A linear equation is an algebraic equation in which each term a constant or variable. In other words, a linear equation is an equation of the form:

y = mx + b

where y and x are variables, m is the slope of the line, and b is the y-intercept (the point where the line intersects the y-axis).

Now,

Let x be the variable or number of hot dogs sold.

Then, according to the problem, the number of sodas sold is 50 more than the number of hot dogs sold. Therefore, the number of sodas sold can be represented as (x + 50).

We know that the total number of sodas and hot dogs sold is 118, so we can write an equation:

x + (x + 50) = 118

Simplifying and solving for x:

2x + 50 = 118

2x = 68

x = 34

Therefore, the number of hot dogs sold is 34, and the number of sodas sold is (x + 50) = 84.

So, the vendor sold 34 hot dogs and 84 sodas at the football game.

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The statement "The functional dependency noted as A->B means that the value of A can be determined from the value of B" is false. In the context of databases and relational schema, functional dependencies are used to express constraints between attributes in a relation.  

False. The functional dependency noted as A->B means that the value of B can be determined from the value of A. In other words, A determines the value of B, and B is functionally dependent on A. This concept is important in database design as it helps to ensure that the data is organized in a logical and efficient manner.

By identifying functional dependencies, we can minimize data redundancy and ensure that the data is consistent and accurate. It also helps in the normalization process, which is a technique used to reduce data redundancy and ensure data integrity. Overall, understanding functional dependencies is essential for effective database design and management.

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Answer:

1. (2,2) 2. (4,1)

Step-by-step explanation:

Solve by graphing both equations. Where the two equations meet, there is a solution.

Step-by-step explanation:

1)2,2

2)4,1

that's answers to your question

The polynomial equation representing the situation is 4x² + 56x = 93  .

In the question ,

it is given that

the length of the rectangular garden is = 16 feet

the width of the rectangular garden is = 12 feet

we have to surround the border by mulch ,

the width of the border with mulch is = x

So the new length with mulch = 16 + x + x = 16 + 2x

and the new width with mulch is = 12 + x + x = 12 + 2x

also given that the area of garden plus border is = 285 square feet

we know that the area is = length × width

On substituting the values length and breadth , we get

285 = (16 + 2x)×(12 + 2x)

285 = 192 + 32x + 24x + 4x²

4x² + 56x + 192 = 285

4x² + 56x = 285 - 192

4x² + 56x = 93

Therefore , The polynomial equation representing the situation is 4x² + 56x = 93  .

The given question is incomplete , the complete question is

Garden a rectangular garden is 12 feet across and 16 feet long. it is surrounded by a border of mulch that is a uniform width x. the maximum area for the garden, plus border, is 285square feet . Write a polynomial equation to represent the situation ?

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Answer:

√ 4 has the same value as 2.

Step-by-step explanation:

Square root means "a number which produces a specified quantity when multiplied by itself." Therefore, square root 4 and 2 have the same value! Hope this helps!

The strategy to use to find out how much framing material they will need is d. Cover the poster with square-inch grid paper to find the area

Cover the poster with square-inch grid paper to find the area - This method would give the total number of square inches of the poster and would be a good starting point for determining the size of the frame required.

The recommended strategy would be to measure the poster in inches with a ruler to determine the dimensions, then use that information to calculate the total area. This would be a good starting point for determining the size of the frame required.

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Answer:

6 scoops

Step-by-step explanation:

If he needs 6 3/4 cups of sugar and he has a 3/4 cup measure all he needs to do if put 6 scoops of sugar.

Answer:

2. 20-9=13

3. 17-2(7)=3

4. 5 with the little 2 -4=21

5. (5-3) with the tiny 2 =4

6. 6+6 with the tiny two =144

7. 12+2(12)=36

8. 9(7)-5(7)=28

9. 4×(21-3(5))=24

10. 7(7)-9(5)=4

11. 10 with the tiny 2-9(9)+3=22

12. 3(7)+4(10)÷2=30.5

Step-by-step explanation:

it's just like a regular math problem just replace all the letters with what they equal as a number and then it's a normal problem.

Answer:

21x^2 - 16x + 5

Yesss this is the answer :))))))

Answer:

(12x²-8)+(45x²-13)

(12x²+45x²)+(13-8)

57x⁴+5

to determine the values of x where the graph of f has points of inflection in the interval (-4, 3), further analysis or numerical methods are required.

To find the points of inflection of the function f(x) using its second derivative, we need to look for values of x where the second derivative changes sign. In other words, we need to find the values of x where f''(x) = 0 or where f''(x) does not exist.

Given the second derivative f''(x) = x^2*cos(x^2 - 2x - 6), we need to find where this expression equals zero or where it is undefined.

Setting f''(x) equal to zero:

x^2*cos(x^2 - 2x - 6) = 0

Since x^2 cannot be zero, we only need to consider where cos(x^2 - 2x - 6) equals zero:

cos(x^2 - 2x - 6) = 0

Now, to find the values of x where the cosine function equals zero, we can solve for x:

x^2 - 2x - 6 = (n + 1/2)*π, where n is an integer

Unfortunately, the equation x^2 - 2x - 6 = (n + 1/2)*π does not have a simple closed-form solution. We would need to use numerical methods, such as approximation or graphing, to find the specific values of x in the interval (-4, 3) where the graph of f has points of inflection.

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Answer:

70° and 110°

Step-by-step explanation:

If two angles forms a linear pair, this means that the sum of the angles is 180°. If the measure of one angle is x and the measure of the other angle is 1.4 times x plus 12∘

Let A be the first angle = x°

Let B be the second angle = (1.4x+12)°

Since they form a linear pair, then

A+B = 180°

x + 1.4x+12 = 180°

2.4x = 180-12

2.4x = 168

x = 168/2.4

x = 70°

The measure of angle A = 70°

The measure if angle B = 1.4x+12

B = 1.4(70)+12

B = 98+12

B = 110°

The measure of both angles are 70° and 110°

The maximum value of P is 20.68, which occurs when x = 1.67 and y = 1.07.

The optimal solution, we need to first graph the constraints and determine the feasible region.

The first constraint is 3x + 5y ≤ 12, which represents a line with a y-intercept of 2.4 and a slope of -3/5.

The second constraint is 6x + 2y ≤ 10, which represents a line with a y-intercept of 5 and a slope of -3.

Plotting these lines on a graph, we get:

The feasible region is the shaded region that satisfies both constraints and lies in the first quadrant.

Next, we need to evaluate the objective function at each corner point of the feasible region to find the maximum value of P.

The corner points are:

(0, 2.4)

(1.67, 1.07)

(1.43, 0)

(0, 0)

Evaluating P at each of these points, we get:

(0, 2.4):

P = 9.6

(1.67, 1.07):

P = 20.68

(1.43, 0):

P = 17.72

(0, 0):

P = 0

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