You are told that share prices on a particular stock exchange are normally distributed with a standard deviation of $8.75. In order to estimate the mean share price on this stock exchange, a random sample of 27 shares prices was collected at the end of trading on one particular day. The sample had a mean share price of $43.16.

a) Explain why this sample of 27 share prices represents cross-sectional data.

b) Construct a 95% confidence interval for the mean share price of stocks listed on this stock exchange.

c) Provide a practical interpretation of the interval you have constructed in b) in the context of this question.

d) If instead you had been asked to construct a 99% confidence interval in b), would the 95% interval be wider or narrower than the 99% interval? Briefly explain the reasoning behind your answer (no calculation required)

The true statements about the functions are:

The complete question is in the attached image

From the image, we have:

This means that the true statements about the functions are g(x) has the maximum greatest value and h(x) has a range of all negative numbers.

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Answer: 4 IMAGES

7) slope = 0, Y-intercept = (0, -4)

8) Slope = -1, Y-intercept = (0, -1)

9) Slope= -2/5, Y-intercept= (0, -1)

10) Slope= -2, Y-intercept= (0, 4)

Step-by-step explanation:

I hope it's correct

Answer:

There isn't much to say because there is no image with the options but, no, all these measures of desperation are affected by extreme values

Answer: 3

Step-by-step explanation:

Answer:68,841 in interest over 30 years

Step-by-step explanation:

Hope this helps

Answer:29m^2+

405/2

Step-by-step explanation:

An approximate solution to the equation f(x) = g(x) to the nearest quarter of a unit is; A: 2.5

We are given;

f(x) = ¹/₄x³ + 2x - 1

g(x) = [5^(x - 1)] - 3

Thus;

f(x) = g(x) gives;

¹/₄x³ + 2x - 1 = [5^(x - 1)] - 3

At x = 2, we have;

LHS = 5

RHS = 2

At x = 2.5, we have;

LHS = 7.90625

RHS = 8.180

The answer to the two sides are close and so we can adopt that.

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H0: p1 ≥ p2 (Null hypothesis: Proportion of ADHD-diagnosed students in School A is equal to or greater than in School B)

Null Hypothesis: The proportion of students diagnosed with ADHD in School A is equal to or greater than the proportion of students diagnosed with ADHD in School B.

Symbolically, the null hypothesis can be stated as:

H0: p1 ≥ p2

Where:

H0: Null Hypothesis

p1: Proportion of students diagnosed with ADHD in School A

p2: Proportion of students diagnosed with ADHD in School B

In other words, the null hypothesis assumes that there is no significant difference or that School A may have an equal or higher proportion of students diagnosed with ADHD compared to School B.

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If an environmentalist group wishes to measure the amount of dissolved oxygen per liter of water in a local stream, then the detailed solution is down below.

A dataset's variability is quantified by its standard deviation. It is determined by taking the square root of the variance, which is the sum of the squared deviations between each value in the dataset and its mean. How far a dataset's individual values deviate from its mean is determined by its standard deviation. A low standard deviation suggests that the dataset's values are close to the mean, whereas a large standard deviation suggests that the dataset's values are widely dispersed. When comparing the spread of two or more datasets, standard deviation is frequently utilised. It is a widely used statistical measure of dispersion.

How to solve?

a. The point estimate for the average amount of dissolved oxygen is 4.62 mg.

b. The distribution to use to construct the confidence interval is student-t.

c. Provide the values A - E for this problem on the following graph.

A. The sample mean is 4.62 mg.

B. The sample standard deviation is 0.92 mg.

C. The degrees of freedom for the student-t distribution is 45 - 1 = 44.

D. The t-value for a 90% confidence interval with 44 degrees of freedom is 1.699.

E. The error bound or margin of error is 0.92 mg * 1.699 = 1.57 mg.

d. The Confidence Interval is (4.62 - 1.57, 4.62 + 1.57) = (3.05, 6.19) mg, which means the error bound (or margin of error) is 1.57 mg.

e. The interpretation of this interval is that the environmentalists are confident that the true amount of dissolved oxygen in the stream is between 3.05 mg and 6.19 mg.

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Answer:

If 5 is added to the square of a positive number,the sum is 69.find the number.

pls mark me as a brainalist pls

Given:

A box contains four tiles, numbered 1,4,5, and 8. Kelly randomly chooses one tile, places it back in the box, then chooses a second tile.

To find:

The probability that the sum of the two chosen tiles is greater than 7.

Solution:

A box contains four tiles, numbered 1,4,5, and 8. So, the total possible outcomes are:

S = {(1,1),(1,4),(1,5),(1,8),(4,1),(4,4),(4,5),(4,8),(5,1),(5,4),(5,5),(5,8),(8,1),(8,4),(8,5),(8,8)}

n(S) = 16

A : Sum of the two chosen tiles is greater than 7.

A = {(1,8),(4,4),(4,5),(4,8),(5,4),(5,5),(5,8),(8,1),(8,4),(8,5),(8,8)}

n(A) = 11

So, probability that the sum of the two chosen tiles is greater than 7 is

\(Probability=\dfrac{n(A)}{n(S)}\)

\(Probability=\dfrac{11}{16}\)

Therefore, the required probability is \(\dfrac{11}{16}\).

The probability that the sum of the two chosen tiles is greater than 7 is;

P(sum of the two chosen tiles is greater than 7) = 11/16

We are told that the four tiles are numbered as;

1, 4, 5 and 8.

Now, let us look at all the possible combinations that are greater than 7 and they are;

(1, 8), (8, 1), (4, 5), (4, 4), (5, 4), (5, 5), (4, 8), (8, 4), (5, 8), (8, 5), (8, 8)

Since there are 4 number, then the total number of possible two digit number that can be formed if the first tile is replaced after choosing before a second one is chosen is; 4 × 4 = 16 possible ways

There are 11 possible combinations that are greater than 7.

Thus;

P(sum of the two chosen tiles is greater than 7) = 11/16

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Answer:

D: 7c + 9t

Step-by-step explanation:

I assume c = car and t = truck

Since it costs 7 dollards PER car and 9 dollars PER truck, you would use 7c+9c as the equation.

Answer:

y=4x

Step-by-step explanation:

this is because all other systems are defined and can be solved simultaneously...

pls lime and follow me ...i follow back...thanks

Answer:

lines a and b are parallel because their corresponding angles are congruent.

Step-by-step explanation:

Since there are two angles equal to 110 in the same position, lines a and b are parallel because their corresponding angles are congruent.

Answer:

30 ml

Step-by-step explanation:

Answer:

800 miles.

Step-by-step explanation:

He would travel 800 miles because 320 divided by 10 is 32. 32 multiplied by 25 is 800.

Hope this helps!

The given paragraph states that a stationery shop has been running for 10 years near campus in Jakarta.

Students like the asker often visit this store to purchase stationery, markers, rulers, and photocopiers.

The word "been" is a past participle of the verb "be." It is used to show the completion of an action in the past.

In this case, it implies that the stationery shop has been operating for the past 10 years near the campus.

The sentence can be rewritten as follows to make use of the word "been":

"The stationery shop has been providing stationery, markers, rulers, and photocopiers to students near the campus for 10 years."

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Answer:

b=−5

Step-by-step explanation:

Subtract the numbers

b=2−7                                                            

b= −5

Answer:

b = -5

Step-by-step explanation:

b = 2 - 7

b = -5

TRUNCATED to one decimal place, it's 50.2

ROUNDED to one decimal place, it's 50.3

The round-off of 50.272 to 1 decimal place using rules of rounding

numbers are 50.3.

Rounding off numbers means making a number simpler by adjusting it to its nearest place according to certain rules.

Rounding a number to one decimal place means keeping only the first digit after the decimal point and neglecting the rest. In this case, the digit in the second decimal place is 7, which is greater than or equal to 5. As per the rounding rules, if the digit is greater than 5, the preceding digit is increased by 1.

So, 50.272 becomes 50.3 when rounded to one decimal place.

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Answer:

rectangle

424 in.²

42,400 in.²

320 in.³

0.32 in.³

Step-by-step explanation:

The box has the shape of a rectangular prism.

The cross section of the box is a rectangle.

The length and width are the length and width of the base of the prism.

surface area = perimeter of base × height + 2 × length × width

surface area = 2(length + width) × height + 2 × length × width

surface area = 2(10 in. + 16 in.) × 2 in. + 2 × 10 in. × 16 in.

surface area = 104 in.² + 320 in.²

surface area = 424 in.²

When you scale a solid by a factor of k on a linear measurement, the area is scaled by a factor of k². Since the linear dimensions are scaled by a factor of 10, then the surface area is scaled by a factor os 10² = 100. The surface area of the box scaled by a factor of 10 is 424 in.² × 100 = 42,400 in.²

volume = length × width × height

volume = 10 in. × 16 in. × 2 in.

volume = 320 in.³

When you scale the linear dimensions of a solid by a factor of k, the volume is scaled by a factor of k³. The linear scale factor is 1/10. The change in volume is a factor of (1/10)³ = 1/1000. The original volume is 320 in.³. The scaled volume is 320 in.³ × 1/1000 = 0.32 in.³.

Answer:

Approximately 0.51

Step-by-step explanation:

If events A and B are independent, then P(A and B) = P(A)*P(B) is a true equation.

We're given the following

     P(A) = 0.65

     P(A and B) = 0.33

So,

P(A and B) = P(A)*P(B)

0.33 = 0.65*P(B)

P(B) = 0.33/0.65

P(B) = 0.5076923076923

which is approximate. When we round to 2 decimal places, we get 0.51

The divergence theorem provides a useful tool to calculate the surface integral of a vector field across a closed surface by relating it to the volume integral of the divergence of the vector field. The specific calculation requires determining the divergence of the given vector field and performing the necessary integration over the enclosed volume.

To calculate the surface integral using the divergence theorem, we need both the vector field f(x, y, z) and the surface S across which we want to calculate the flux. However, the specific vector field f(x, y, z) and surface S are not provided in your question.

The divergence theorem states that the flux of a vector field across a closed surface is equal to the triple integral of the divergence of the vector field over the volume enclosed by the surface. Mathematically, it can be expressed as:

∬S f · ds = ∭V (∇ · f) dV

Where:

∬S denotes the surface integral over the closed surface S.

f represents the vector field.

ds represents the outward-pointing vector normal to the surface element dS.

∭V denotes the triple integral over the volume V enclosed by the surface.

∇ · f represents the divergence of the vector field f.

In summary, the divergence theorem provides a useful tool to calculate the surface integral of a vector field across a closed surface by relating it to the volume integral of the divergence of the vector field. The specific calculation requires determining the divergence of the given vector field and performing the necessary integration over the enclosed volume.

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Use the Divergence Theorem to calculate the surface integral S F · dS; that is, calculate the flux of F across S. F(x, y, z) = xyezi + xy2z3j − yezk, S is the surface of the box bounded by the coordinate plane and the planes x = 3, y = 6, and z = 1.

Answer:

D

Step-by-step explanation:

Area of triangle= ½ ×base ×height

Since the length of the base and the height of the triangle is equivalent to the length of a side of the square, s,

area of triangle

= ½ ×s ×s

= ½s²

Given that the area of the triangle is 12.5 units²,

½s²= 12.5

Multiply both sides by 2:

s²= 12.5(2)

s²= 25

Square root both sides:

\(s = \sqrt{25} \)

s= 5 units

(reject negative value since s > 0)

Answer:

Angle 1 = 128

Angle 2 = 52

Angle 3 = 47

Angle 4 = 133

Angle 5 = 81

Step-by-step explanation:

Angle 5 is 81

Angle 3 is 47

Angle 4 is 133

Angle 2 is 52

Angle 1 is 128

The number will be "6".

Let,

According to the question, the equation will be:

By solving the above expression, we get

→ \(6\times x=36\)

By applying cross-multiplication, we get

→ \(x = \frac{36}{6}\)

→    \(= 6\)

Thus the above response i.e., "option b" is correct.

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The answers that  best explains how we check to make sure that this condition is met is: c. Make sure there is similar spread around the sample mean of y.

The equal spread condition states that the residuals (differences between the actual and predicted values of y) should have roughly equal variance at each value of x.

To check if this condition is met, we examine the residual plot, which is a scatterplot of the residuals versus the independent variable x. If the spread of residuals around the mean is roughly equal for all x, then the equal spread condition is satisfied.

Therefore the correct option is C.

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Answer:

One solution

Step-by-step explanation:

Answer:

The correct answer is A.) one

Step-by-step explanation:

I just did the test on edge 2021 and got it right!

Thus, if M = $1.5 trillion, V = 7, and P = 1.05, the real output of the economy (Q) is $10 trillion.

The equation of exchange is an economic equation that relates the money supply (M) with the price level (P), the velocity of money (V), and the real output of the economy (Q). The equation is M x V = P x Q.

Using the given values of M = $1.5 trillion, V = 7, and P = 1.05, we can solve for Q by rearranging the equation as Q = M x V / P.

Plugging in the numbers, we get:

Q = ($1.5 trillion x 7) / 1.05 = $10 trillion

Therefore, if M = $1.5 trillion, V = 7, and P = 1.05, the real output of the economy (Q) is $10 trillion.

It's worth noting that the equation of exchange is a theoretical model and may not reflect actual economic conditions. In practice, changes in any one of the variables (M, V, P, or Q) can affect the others, and there may be other factors at play that influence the economy.

Nonetheless, the equation of exchange provides a useful framework for thinking about the relationship between the money supply, prices, and economic activity.

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Complete question

in the equation of exchange, if m = $1.5 trillion, v = 7, and p = 1.05, then:

Find real output.

Answer:

69

Step-by-step explanation:

420