Please help me solve this. Please don’t give me a link, or it will be reported. Please provide step by step explanations. Thanks.

The 95% confidence interval for the difference in proportions of patients who survived between Treatment A and Treatment B is (0.027, 0.173). Treatment A appears to be more effective than Treatment B.

To find the 95% confidence interval for the difference in proportions of patients who survived between Treatment A and Treatment B, we can use the formula:

CI = (p₁ - p₂) ± z * SE

where:

p₁ is the proportion of patients who survived in Treatment A

p₂ is the proportion of patients who survived in Treatment B

z is the z-score associated with the desired level of confidence (in this case, 95%)

SE is the standard error of the difference between two proportions, calculated as:

\(SE = \sqrt{p_1 \times \dfrac{(1-p_1)}{n_1} + p_2 \times \dfrac{(1-p_2)}{n_2}}\)

where n₁ and n₂ are the sample sizes for Treatment A and Treatment B, respectively.

Using the given proportions, we have:

p₁ = (0.8 + 0.6 + 0.4)/3 = 0.6

p₂ = (0.7 + 0.5 + 0.3)/3 = 0.5

n₁ = n₂ = 3

Plugging these values into the formula, we get:

SE = √((0.6 * 0.4)/3 + (0.5 * 0.5)/3) = 0.1768

z = 1.96 (for a 95% confidence level)

CI = (0.6 - 0.5) ± 1.96 * 0.1768 = (0.027, 0.173)

A possible conclusion based on this interval is that the true difference in proportions of patients who survived between Treatment A and Treatment B lies somewhere between 0.027 and 0.173, with 95% confidence. Since the interval does not include 0, we can conclude that there is a statistically significant difference in the proportions of patients who survived between the two treatments. Specifically, Treatment A appears to be more effective than Treatment B.

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--The complete question is, A medical study looked at the effectiveness of two different treatments for a certain disease. The study summarized the data by banding patients by age group and reporting the proportion of patients in each band who survived over a ten-year period. The proportions for the two treatments are as follows:

Treatment A:

Proportion survived in band 1: 0.8

Proportion survived in band 2: 0.6

Proportion survived in band 3: 0.4

Treatment B:

Proportion survived in band 1: 0.7

Proportion survived in band 2: 0.5

Proportion survived in band 3: 0.3

Assuming normal-based inference is appropriate, what is the 95% confidence interval for the difference in proportions of patients who survived between Treatment A and Treatment B, based on the given data? Based on this interval, what is a possible conclusion about the true difference in proportions?--

The length of the line segment AB is 11/2 mm.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points.

Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

We know a line segment parallel to one side of a triangle divides the other two sides in the same ratio.

Therefore, AC/AB = EC/ED.

22/AB = 44/11.

2/AB = 4/11.

4AB = 22.

AB = 11/2.

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Answer: 52.5

Step-by-step explanation: 175 x .3

Answer:

30 × 175 / 100

52.5

step by step explanation

Answer:

B

Step-by-step explanation:

The sections of the parallel roads split by the transversals are in proportion, that is

\(\frac{350}{300}\) = \(\frac{first}{1650}\) ( cross- multiply )

300 first = 577500 ( divide both sides by 300 )

first = 1925 ft

Thus

Elm st → Maple st = 1925 + 350 = 2275 ft → B

Answer:

a is Angle L is 67.5 degrees. Angles F and L are opposite each other, yet the same angle degree.

Step-by-step explanation:

Answer:

X=28

Step-by-step explanation:

4x+248=360

112=4x

x=28

Answer:

28

Step-by-step explanation:

Answer: 895 phones

Step-by-step explanation:

Given that :

The function : y = 1.28e^1.31x ; is used to model the number of camera phones shipped since 1997

y = number of camera phones ; x = number of years since 1997

The number of camera phones shipped in the year 2002 can be obtained thus ;

x = 2002 - 1997 = 5 years

y = 1.28e^(1.31 * 5)

y = 1.28e^6.55

y = 1.28(699.24417)

y = 895.03254

y = 895 phones

Answer:

B; 125

Step-by-step explanation:

45% of 500 is 225. 20% of 500 is 100

225 - 100 = 125

Hope this helps :)

Answer:

B)125

Step-by-step explanation:

i'm just guessing since i don't know the answer. I hope it's right

The total number possible house numbers  is  2 × 28  =  56

From the question, we have the following information available is:

Dr. Math's four-digit house number ABCD contains no zeroes and can be split into two different two-digit primes AB and CD where the digits A, B, C and D are not necessarily distinct.

And, each of the two digit primes number is less than 40

We have to find the number of possible houses.

Now, According to the question:

We have to take out the primes number in between 1 to 40.

So, The prime numbers in between 1 to 40 are:

The two digit primes < 40 are

11, 13, 17, 19, 23, 29, 31, 37

Any two of these eight can be selected  =  C(8,2)  = 28

And each of these can be arranged in two ways

Hence, the total number possible house  numbers  is  2 × 28  =  56

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Answer:

Step-by-step explanation

\(t_{12}=-2(3)^{12-1}\\=-2(3)^{11}\\=-354294\)

The test statistic t0 for a sample with n = 20, x = 7.5, s = 1.9, and if H1: μ < 8.3 is calculated to be  -1.886.

To calculate the test statistic t0, we can use the following formula:

t0 = (x - μ) / (s / √n)

where x is the sample mean, μ is the hypothesized population mean (in this case, 8.3), s is the sample standard deviation, and n is the sample size.

Given the values provided:

x = 7.5 (sample mean)

μ = 8.3 (hypothesized population mean)

s = 1.9 (sample standard deviation)

n = 20 (sample size)

Plugging these values into the formula, we get:

t0 = (7.5 - 8.3) / (1.9 / √20)

t0 = -0.8 / (1.9 / √20)

t0 = -0.8 / (1.9 / 4.472) (rounded to three decimal places)

t0 = -0.8 / 0.424

t0 = -1.886 (rounded to three decimal places)

Therefore, the test statistic t0 is calculated to be -1.886.

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Using the inscribed angle theorems, the measure of the indicated angles are:

1. m∠BOA = 26°

2. m∠BDA = 13°

3. m∠BCA = 13°

Based on the inscribed angle theorem, the following relationships are established:

Given:

Intercepted arc BA = 26°

1. ∠BOA is central angle

Thus:

m∠BOA = 26° (inscribed angle theorems)

2. ∠BDA is inscribed angle.

m∠BDA = 1/2(30) = 13° (inscribed angle theorems)

3. m∠BCA = m∠BDA = 13° (inscribed angle theorems)

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False. The statement you described is not an equivalent form for a conditional statement. The process you mentioned, which is reversing and negating the antecedent and consequent, is known as forming the contrapositive of the statement.

A conditional statement has the form "If P, then Q," where P is the antecedent and Q is the consequent. The contrapositive is formed by negating both the antecedent and consequent, and reversing their order: "If not Q, then not P." The contrapositive is equivalent to the original conditional statement.

However, simply reversing the antecedent and consequent without negating them gives you the converse, which is "If Q, then P." The converse is not equivalent to the original conditional statement.

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Answer:

Step-by-step explanation:$9 daylilies, $4shrubs. 9x5=45+4x5=20 $65. 9x4=36+10x4=$76

Answer:

1,3,9

Step-by-step explanation:

Answer:

1,3,9

Step-by-step explanation:

Three, one and nine are the only factors of nine.

Answer:

8x + 5

Step-by-step explanation:

\(3(x^{2} +2x+3) - 2(x^{2} +2)=\)

\(3x^{2} + 6x + 9 -2x^{2} -4=\)

\(5x^{2} +6x+5\)

It is more convenient to integrate with respect to y.

What is the quadratic equation?

The solutions to the quadratic equation are the values of the unknown variable x, which satisfy the equation. These solutions are called roots or zeros of quadratic equations. The roots of any polynomial are the solutions for the given equation.

To sketch the region enclosed by the curves y = 3x² and y = 5x - 2x² and determine whether to integrate with respect to x or y, we can analyze the intersection points and the shape of the curves.

First, let's find the intersection points by setting the equations equal to each other:

3x² = 5x - 2x²

Combining like terms:

5x² - 5x = 0

Factoring out x:

x(5x - 5) = 0

Solving for x:

x = 0 or x = 1

So the curves intersect at x = 0 and x = 1.

Next, we can analyze the behavior of the curves to determine the orientation of the region.

For y = 3x², we have a parabola that opens upwards. This curve lies below the x-axis and is symmetric with respect to the y-axis.

For y = 5x - 2x², we have a downward-opening parabola. This curve lies above the x-axis and is symmetric with respect to the y-axis.

Based on this information, we can sketch the region enclosed by the curves.

The region enclosed by the curves is bounded by the curves themselves and the x-axis. It is the area between the curves from x = 0 to x = 1.

To determine whether to integrate with respect to x or y, we can observe that the region is vertically oriented, meaning it extends vertically between the curves.

Therefore, it is more convenient to integrate with respect to y.

To draw a typical approximating rectangle, we can choose a small interval along the y-axis and draw a rectangle that spans between the curves for that particular y-interval. This rectangle will represent an approximation of the region's area.

Hence, it is more convenient to integrate with respect to y.

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The upper bound of the 95% confidence interval for the average age in the U.S. is 48.29 years.

To determine the upper bound of the 95% confidence interval for the average age in the U.S., we can use the sample data from the survey. The sample size is 1072 people, randomly selected from the U.S. population, with a minimum age of 12. By calculating the average age of the respondents, we can estimate the average age of the entire U.S. population.

Using the given information that the average age of the respondents is 43.56 years, and assuming that the sample is representative of the population, we can calculate the standard error. The standard error measures the variability of the sample mean and indicates how much the sample mean might deviate from the population mean.

Using statistical methods, we can calculate the standard error and construct a confidence interval around the sample mean. The upper bound of the 95% confidence interval represents the highest plausible value for the population average age based on the sample data.

Therefore, based on the provided information and calculations, the upper bound of the 95% confidence interval for the average age in the U.S. is 48.29 years.

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When solving a problem involving fractions, it's important to understand the meaning of the numerator and denominator. The numerator represents the part of the whole that we are interested in, while the denominator represents the total number of equal parts that the whole is divided into.

Let's say we have a fraction 2/5. The denominator 5 indicates that the whole is divided into 5 equal parts, while the numerator 2 indicates that we are interested in 2 of those parts.

Therefore, the fraction 2/5 represents the ratio of 2 out of 5 equal parts of the whole.To answer a question involving fractions with a denominator of 200, you need to know that the whole is divided into 200 equal parts.

Then you can use the numerator to represent the specific part of the whole that is being referred to in the question.For example, let's say a question asks what is 1/4 of the whole when the denominator is 200.

We know that the whole is divided into 200 equal parts, so we can set up a proportion:1/4 = x/200To solve for x, we can cross-multiply:

4x = 1 x 2004x = 200x = 50

Therefore, 1/4 of the whole when the denominator is 200 is 50. In this way, you can approach any question involving fractions with a denominator of 200 or any other number by understanding the meaning of the numerator and denominator and setting up a proportion.

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Answer:

1. Ice melts under heat and temperatures above freezing point.

2. If I leave my ice underneath the sun, then it will melt.

3. I would test it by putting ice into a bowl and leave it outside for five minutes.

4. After five minutes, I would go outside and see what percentage of the ice has melted.

5. Ice melts underneath high temperatures and the higher the temperature, the faster the ice melts.

Step-by-step explanation:

If Fidel has a rare coin worth $550 and its value increases by 10% each decade, we can calculate the value of the coin after a certain number of decades by applying the compound interest formula.

The compound interest formula is given by:

A = P(1 + r)^n

Where:

A is the final amount (value of the coin after n decades)

P is the initial amount (value of the coin)

r is the interest rate per period (in decimal form)

n is the number of periods (in this case, the number of decades)

In this case, the initial amount (P) is $550 and the interest rate per decade (r) is 10% or 0.1 (in decimal form).

Let's calculate the value of the coin after 1 decade:

A = 550(1 + 0.1)^1

A = 550(1.1)

A = $605

After 1 decade, the value of the coin would be $605.

Similarly, we can calculate the value of the coin after multiple decades. For example, after 2 decades:

A = 550(1 + 0.1)^2

A = 550(1.1^2)

A = $665.50

After 2 decades, the value of the coin would be $665.50.

You can continue this calculation for any number of decades to determine the value of the coin.

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Answer:

x = 13

Step-by-step explanation:

(11x - 15) + (5x - 13) =180

16x -28 = 180

16x = 208

x = 13

The value of x in the given figure is 12.375

The linear pair of angles are formed when two lines intersect each other at a single point. The angles are said to be linear if they are adjacent to each other after the intersection of the two lines.

The sum of angles of a linear pair is always equal to 180°.

Given that, a line with a ray, making angles (11x - 15)° and (5x - 13)°

Here we will use the concept of linear pair sum,

Therefore,

11x-15 + 5x - 13 = 180°

16x - 18 = 180°

16x = 198

x = 12.375

Hence, the value of x in the given figure is 12.375

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-1 and -11 are two integers that may multiply to produce 11 and also add to make -12.

In its most basic form, an equation is a mathematical statement that indicates that two mathematical expressions are equal. 3x + 5 = 14, for example, is an equation in which 3x + 5 and 14 are two expressions separated by a 'equal' sign. A mathematical statement made up of two expressions joined by an equal sign is known as an equation. 3x - 5 = 16 is an example of an equation. We get the value of the variable x as x = 7 after solving this equation.

Here,

Let x and y be the number.

x+y=-12

xy=11

y=11/x

x+11/x=-12

x²+12x+11=0

x²+11x+x+11=0

x(x+11)+1(x+11)=0

x=-11,-1

The numbers that can multiply to make 11, and also add together to make -12 are -1 and -11.

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Answer:

can you please be more specific, because i would love to help!

Step-by-step explanation:

Answer:

The mean would increase

"y" will represent the total cost per month

"x" will represent the number of movies watched in one month

There are two streaming plans:

Plan A

Has a monthly fee of $16 plus $2 per movie watched.

→ So if he watches no movies in a month, he will pay $16 and for each movie watched he will pay an extra $2

You can represent the monthly cost of plan A as follows:

Plan B

Has a monthly fee of $12 plus $3 for every movie watched.

The monthly cost of the plan can be expressed as follows:

For both equations the y-interceot represents the monthly fee of the plan and the slope of the line is the cost per movie.

To determine the number of movies (x) that would make both plans cost the same for one month using a graph, you have to draw both lines and determine the point where they intercept. The x-coordinate of said point will be the number of movies that make both plans cost the same.

To draw the lines you have to determine at least two points of the line.

The easiest point will be the y-intercept, for the second point, choose any value of x, replace it in the formula and calculate the corresponding value of y. Then plot both points and draw the line.

For plan A

y-intercept, x=0

The coordinates are (0,16)

Second point, for example, for x= 2 movies

The coordinates are (2,20)

For plan B

y-intercept, x=0

The coordinates are (0,12)

Second point, for example, for x=3

The coordinates are (3,21)

The red line represents the cost with respect to the number of movies for plan A

The purple line represents the cost with respect to the number of movies for plan B

Where both lines intercept indicates the point when both plans cost the same. Said point is (4,24), which means that when you watch x=4 movies both plans will cost $24 that month.

Answer:

  7. shifted right 8 units

  8. shifted left 4 and up 12 units

  9. shifted up 8 units

Step-by-step explanation:

You want to compare the given functions with p(x) = a(x -h)² +k and tell the value and effect of a, h, and k on the vertex.

In the equation for p(x) above, the value 'a' represents a vertical scale factor. It expands the graph vertically by the factor 'a'. If a < 0, the graph is reflected across the x-axis.

The values 'h' and 'k' in the equation for p(x) represent a right shift of the graph by 'h' units and a shift up by 'k' units. That is, the graph is translated by (h, k).

We have h = 8. The graph is shifted right 8 units.

We have (h, k) = (-4, 12). The graph is shifted left 4 units and up 12 units.

The values of the transformation parameters are a = -1/2 and k = 8. The vertical compression and reflection do not affect the vertex. The vertex is shifted up 8 units.

Answer:

230,000

Step-by-step explanation:

if the value increases by 5% and 5% of 200,000 is 10,000 so in 3 years the price will increase to 230,000

Answer:

231,525

220,500 if you're not adding on the 2017

Step-by-step explanation:

2015

200000÷100=2000 (1%)

2000x5=10000

200000+10000=210000

2016

210000÷100=2100

2100x5=10500

210000+10500=220500

2017

220500÷100=2205

2205×5=11025

220500+11025=231525

I don't know if you're meant to add on the 2017 5% or not

Answer:divideing by the whole number

Step-by-step explanation: