the variance of a portfolio P of N assets is given by:
If N=5, how expression is summarized?
please help ..

RS is a segment bisector.

R is the vertex of a pair of congruent angles in the diagram.

S is the midpoint of a segment in the diagram.

Options A, C, and E are the correct answer.

It is a two-dimensional figure which has three sides and the sum of the three angles is equal to 180 degrees.

We have,

From the diagram below we have,

PQ = segment

RS = Bisector of the segment PQ

R = Vertex having two congruent angles.

Thus,

RS is a segment bisector.

R is the vertex of a pair of congruent angles in the diagram.

S is the midpoint of a segment in the diagram.

Options A, C, and E are the correct answer.

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Answer:

Step-by-step explanation:

n + (n+1) = 123

2n+1 = 123

n = 61

The argument is valid. The argument is valid based on the direct truth-table method.

To test the validity of the argument, we can use the direct truth-table method. Let's break down the argument and construct the truth table for the given premises and the conclusion:

Premises:

G ⊃ H

R ≡ G

~H v G

Conclusion:

R • H

Constructing the truth table:

We have three propositions: G, H, and R. Each proposition can have two truth values, true (T) or false (F). Therefore, we need 2^3 (8) rows in the truth table to evaluate all possible combinations.

By evaluating the truth table, we find that in all rows where the premises (1, 2, 3) are true, the conclusion (R • H) is also true. There is no row where the premises are true, but the conclusion is false. Therefore, the argument is valid.

The argument is valid based on the direct truth-table method. This means that if the premises (G ⊃ H, R ≡ G, ~H v G) are true, then the conclusion (R • H) must also be true.

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Answer:

11

Step-by-step explanation:

6x+7=8x-15

7=2x+15

22=2x

11=x

Answer:

11 =x

Step-by-step explanation:

6x +7=8x -15

Subtract 6x from each side

6x-6x +7=8x-6x -15

7 = 2x -15

Add 15 to each side

7+15 = 2x-15+15

22 =2x

Divide each side by 2

22/2 = 2x/2

11 =x

To determine if the success ratios of Incubator A and Incubator B are significantly different, we can perform a hypothesis test.

Let's set up the null and alternative hypotheses as follows:

Null Hypothesis (H0): The success ratios of Incubator A and Incubator B are not significantly different.

Alternative Hypothesis (H1): The success ratios of Incubator A and Incubator B are significantly different.

We can use a significance level (α) of 0.05, which is a common choice.

To test the hypothesis, we can use a two-proportion z-test since we are comparing the success ratios of two groups. The formula for the test statistic is:

z = (p1 - p2) / sqrt(p_hat * (1 - p_hat) * (1/n1 + 1/n2))

where:

p1 and p2 are the success ratios of Incubator A and Incubator B, respectively,

p_hat is the pooled sample proportion,

n1 and n2 are the sample sizes of Incubator A and Incubator B, respectively.

Let's calculate the test statistic and compare it to the critical value to make a decision.

Given:

Success ratio of Incubator A (p1) = 0.70

Sample size of Incubator A (n1) = 57

Success ratio of Incubator B (p2) = 0.39

Sample size of Incubator B (n2) = 40

First, calculate the pooled sample proportion (p_hat):

p_hat = (x1 + x2) / (n1 + n2)

where x1 is the number of successes in Incubator A and x2 is the number of successes in Incubator B. Since we are not given the actual counts, we cannot calculate the exact value of p_hat.

Next, calculate the test statistic (z) using the formula above.

Once we have the test statistic, we can compare it to the critical value from the standard normal distribution at the specified significance level (α) to make a decision.

If the test statistic falls within the rejection region (i.e., it is beyond the critical value), we reject the null hypothesis. If it falls within the acceptance region (i.e., it is within the critical value), we fail to reject the null hypothesis.

Without knowing the actual counts of successes in Incubator A and Incubator B, we cannot perform the calculations to determine if the success ratios are significantly different.

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Yes, you can show significant differences using superscripts in an ANOVA (Analysis of Variance) single-factor test.

In an ANOVA test, superscripts are commonly used to indicate significant differences between the means of different groups or treatments.

Typically, letters or symbols are assigned as superscripts to denote which groups have significantly different means. These superscripts are usually presented adjacent to the mean values in tables or figures.

The specific superscripts assigned to the means depend on the statistical analysis software or convention being used. Each group or treatment with a different superscript is considered significantly different from groups with different superscripts. On the other hand, groups with the same superscript are not significantly different from each other.

By including superscripts, you can visually highlight and communicate the significant differences between groups or treatments in an ANOVA single-factor test, making it easier to interpret the results and identify which groups have statistically distinct means.

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True. Time series data refers to a collection of observations gathered over time, where the time dimension is a critical component of the data.

Each data point is linked to a specific point in time. In contrast, cross-sectional data is collected at a single point in time and does not have a time dimension. Therefore, the timing of each observation is crucial in time series data but not as important in cross-sectional data.

Time series data is a sequence of data points indexed in time order. It is used to track change over time.

Cross-sectional data is a snapshot of data at a specific point in time. It is used to compare different groups or variables .

Think about how the time at which each observation is made affects the analysis of time series data and cross-sectional data.

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Answer:

Step-by-step explanation:

let one side be x

and other side be 3x - 4

so perimeter = x + ( 3x - 4 ) + x + ( 3x - 4 )

80cm = 8x - 8

88cm = 8x

11cm = x

x = 11cm

3x - 4 = 3×11 -4

= 29cm

so sides are 11cm and 29cm

a) The range is 14.

b) The sample variance is 20.78.

c) The sample standard deviation is 4.56.

a) Range

The range of a given set of data values is the difference between the maximum and minimum values in the set. In this case, the maximum value is 15 and the minimum value is 1. So, the range is:

Range = maximum value - minimum value

Range = 15 - 1

Range = 14

b) Sample variance

To calculate the sample variance, follow these steps:

1. Calculate the sample mean (X). To do this, add up all of the data values and divide by the total number of values:

n = 9

∑x = 7 + 4 + 6 + 12 + 8 + 15 + 1 + 9 + 13 = 75

X = ∑x/n = 75/9 = 8.33

2. Subtract the sample mean from each data value, square the result, and add up all of the squares:

(7 - 8.33)² + (4 - 8.33)² + (6 - 8.33)² + (12 - 8.33)² + (8 - 8.33)² + (15 - 8.33)² + (1 - 8.33)² + (9 - 8.33)² + (13 - 8.33)² = 166.23

3. Divide the sum of squares by one less than the total number of values to get the sample variance:

s² = ∑(x - X)²/(n - 1) = 166.23/8 = 20.78

Therefore, the sample variance is 20.78 (rounded to two decimal places).

c) Sample standard deviation

To calculate the sample standard deviation, take the square root of the sample variance:

s = √s² = √20.78 = 4.56

Therefore, the sample standard deviation is 4.56 (rounded to two decimal places).

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The student's grade on the examination was transformed to a z-value of 0.67, indicating that she scored approximately in the top one-third of the distribution.

In a normal distribution, z-scores represent the number of standard deviations a particular value is from the mean. A z-score of 0.67 corresponds to a location that is about two-thirds of a standard deviation above the mean. Since the normal distribution is symmetric, we can infer that the student's score is higher than about two-thirds of the scores in the distribution.

To understand this further, let's consider the properties of the normal distribution. In a standard normal distribution, which has a mean of 0 and a standard deviation of 1, the area under the curve between the mean and a z-score of 0.67 is approximately one-third. This means that the student's score falls within the top one-third of the distribution. However, it's important to note that without knowing the exact details of the distribution of scores and its mean and standard deviation, we cannot provide precise information about the student's ranking among her peers. Nonetheless, based on the given z-value, we can conclude that she performed quite well on the examination.

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They tell us that it is distributed in a normal way, which means that the distribution has the following characteristics:

If teh standart deviation is 2.7 gallon and the avriabe is normal distributed we need to know the probability highlighted in the image above, when replacing in the formula with x greater than 25 we obtain:

Answer: 19.5 N

Step-by-step explanation:

Answer:

The answer is 19.2N

Step-by-step explanation:

F=m a

F=64*0.3=19.2N

Answer:

16

Step-by-step explanation:

Divide 640 by 40.

\(640 = x \times 10 \times 4\)

\(640 = 40x\)

Divide both sides by 40

\( \frac{640}{40} = \frac{40x}{40} \\ \)

\(x = 16\)

Thus the height would be 16 feet .

Answer:

b

Step-by-step explanation:

b

a. If angle \( S U T \) is \( 39^{\circ} \), then the angle TUV is also \( 39^{\circ} \) because they are corresponding angles. Corresponding angles are pairs of angles that are in similar positions in relation to two parallel lines and a transversal, such that the angles have the same measure. Angle TUV is corresponding to angle SUT in this case.  The arc measure that describes arc \( V T S \) is \( 141^{\circ} \).  We can make assertions about these angle and arc measures by applying geometric principles such as the corresponding angles theorem and the arc measure formula. These principles allow us to establish relationships between angles and arcs based on their positions and measures.

b. Since we know that angle SUT is \( 39^{\circ} \) and angle TUV is corresponding to it, we can conclude that angle TUV is also \( 39^{\circ} \). This is an application of the corresponding angles theorem. Furthermore, we know that the sum of the arc measures of a circle is \( 360^{\circ} \), and that arc VTS is a minor arc that subtends the central angle TVS. Therefore, we can find the arc measure of arc VTS by applying the arc measure formula:

$$\text{arc measure} = \frac{\text{central angle}}{360^{\circ}} \times \text{circumference}$$

The central angle TVS is the same as angle TUV, which we know is \( 39^{\circ} \). The circumference of the circle is not given, so we cannot calculate the arc measure exactly. However, we know that the arc measure must be less than half the circumference, which is \( 180^{\circ} \). Therefore, we can conclude that the arc measure of arc VTS is less than \( 180^{\circ} \), but we cannot say exactly what it is.

In conclusion, by applying geometric principles such as the corresponding angles theorem and the arc measure formula, we can make assertions about the angle and arc measures in the given problem. We know that angle TUV is \( 39^{\circ} \) because it is corresponding to angle SUT, and we know that arc VTS has an arc measure that is less than \( 180^{\circ} \) based on the arc measure formula.

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Answer:

128 <33

Step-by-step explanation:

6 ÷ 3 + 32 • 4 - 2 = 128

▪︎▪︎▪︎▪︎▪︎▪︎

Answer:

49/4 inches

Step-by-step explanation:

Inches below ground=  3 1/2 inches

Plant's full  height=15 3/4 inches

Height above ground = 15 3/4 inches -3 1/2 inches

63/4 - 7/2

63-14/4

49/4 inches

The answer is that the director can fill the positions in 5040 ways.

A personnel director for a corporation has hired 10 new engineers. If four distinctly different positions are open at a particular plant, in how many ways can the director fill the positions?

The answer is that the director can fill the positions in 5040 ways.

First, let's find out how many ways there are to choose four distinct positions out of the ten engineers. This is a combination problem, so we can use the formula nCr (n choose r), where n is the total number of items and r is the number of items being chosen:

nCr = n! / r!(n-r)!

In this case, n = 10 and r = 4, so:

nCr = 10! / 4!(10-4)! = 10! / 4!6! = (10 x 9 x 8 x 7) / (4 x 3 x 2 x 1) = 210

Now, for each of these combinations of positions, there are 10 x 9 x 8 x 7 ways to choose one engineer for each of the four positions.

This is a permutation problem, so we can use the formula nPr (n permute r), where n is the total number of items and r is the number of items being chosen:

nPr = n! / (n-r)!

In this case, n = 10 and r = 4, so:

nPr = 10! / 6! = 10 x 9 x 8 x 7 = 5040

Therefore, the director can fill the positions in 5040 ways.

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Triangulation is the method of finding the location of an object based on the measurements made from the two other locations. The above statement is true statement.

Triangulation is the division of a face or plane polygon into a series of triangles, usually with the limitation that each side of a triangle is fully shared by two adjacent triangles. In geometry, triangulation is the division of planar objects into triangles, or more broadly, the division of high-dimensional geometric objects into simplifications. Triangulation of a 3D volume involves subdivision into packed tetrahedra that directly measure distances to points. It is a method for finding the location of the object.

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The given solution by the previous solver was not correct as all sections of the excel sheet must be filled out to complete the sheet accurately. The solution by the previous solver presented an incorrect cost as Excel rejected the 1.2234 unity cost.

The numbers with decimals at the end were also incorrect as they were too long (27,751.59). An Excel worksheet is a collection of cells with various properties such as content, size, color, and formulae. It is a table that contains rows and columns of data that can be manipulated to generate meaningful results. It is used to organize, sort, and manipulate data in a meaningful way. The unity cost was presented as 1.2234 by the first solver but Excel rejected it because it has too many decimal places.

Excel considers only two decimal places in monetary values, therefore the correct value should have been 1.22. In addition, Excel also accepts monetary values with commas (,), but they should not be used as the decimal separator. A period (.) should be used instead. Thus, the value of 27,751.59 is invalid and should be corrected to 27.75. This will ensure that the Excel sheet is completed correctly and accurately. In conclusion, it is essential that all sections of an Excel sheet are completed correctly and accurately. It is also important to note that Excel has certain requirements for the correct formatting of monetary values. Commas are used as a separator for thousands, millions, and billions. The previous solver did not meet these requirements and hence presented an incorrect solution. To avoid such errors, it is always advisable to double-check the sheet before submitting it.

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Answer:

\( 41 - ( - 7) = 41 + 7 = 48\)

Edna should leave at 2:07 PM in order to arrive at Jake's party by 2:30 PM

To determine the time Edna should leave, we need to subtract the travel time from the desired arrival time.

If Edna needs to be at Jake's party at 2:30 PM and it takes her 23 minutes to drive there, she should leave 23 minutes before 2:30 PM.

To calculate the departure time, we subtract 23 minutes from 2:30 PM:

2:30 PM - 23 minutes = 2:07 PM

Therefore, Edna should leave at 2:07 PM in order to arrive at Jake's party by 2:30 PM

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9514 1404 393

Answer:

  AC = 20

Step-by-step explanation:

The triangles are all similar, so the ratios of side to hypotenuse are the same:

  5/10 = 10/x

  x = 20 . . . . . . multiply by 2x

The length of AC is 20.

Answer:

85.26

Step-by-step explanation:

Answer:

60.2

Step-by-step explanation:

I saw this again so I am putting the answer here.

5.8*3.5= 20.3 6*4.2= 25.2 4.2*3.5= 14.7 20.3+25.2+14.7= 60.2

Answer:

You end with 2/5 of and inch per minute

Answer:

y = 3

Step-by-step explanation:

since the line is going through the y - axis at 3, all y values will be 3 no matter the x value

The cost of one small box is $10 and the cost of one large box of grapefruit is equal to $16.

This type of problem can be solved using linear equations.

If we consider x to be the cost of one small box and y to be the cost of one large box of fruit, the linear equations can be given as;

12x + 5y = 200

4x + 10y = 200

Multiplying the second equation by 3

12x + 5y = 200

12x + 30y = 600

Now by subtracting both equations we get;

-25y = -400

y = -400 / -25

y = 16

Now adding this value of y = 16 in the first equation;

12x + 5y = 200

12x + 5(16) = 200

12x + 80 = 200

12x = 200 - 80

12x = 120

x = 120 / 12

x = 10

Therefore, $10 is the cost of one small box and $16 is the cost of one large box of grapefruit.

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Answer:

75 I hope this helped and brainliest please!

Step-by-step explanation:

The equation for surface area for a square pyramid is A=a squared + 2a times the square root of (a squared over 4) + height squared. Since everything is 5 yd, the answer is 75.