Please explain or answer this! Answer getting brainliest!

Answer:

Using a formula, the standard error is: 0.052

Using bootstrap, the standard error is: 0.050

Comparison:

The calculated standard error using the formula is greater than the standard error using bootstrap

Step-by-step explanation:

Given

Sample A                          Sample B

[tex]x_A = 30[/tex]                              [tex]x_B = 50[/tex]

[tex]n_A = 100[/tex]                             [tex]n_B =250[/tex]

Solving (a): Standard error using formula

First, calculate the proportion of A

[tex]p_A = \frac{x_A}{n_A}[/tex]

[tex]p_A = \frac{30}{100}[/tex]

[tex]p_A = 0.30[/tex]

The proportion of B

[tex]p_B = \frac{x_B}{n_B}[/tex]

[tex]p_B = \frac{50}{250}[/tex]

[tex]p_B = 0.20[/tex]

The standard error is:

[tex]SE_{p_A-p_B} = \sqrt{\frac{p_A * (1 - p_A)}{n_A} + \frac{p_A * (1 - p_B)}{n_B}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{\frac{0.30 * (1 - 0.30)}{100} + \frac{0.20* (1 - 0.20)}{250}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{\frac{0.30 * 0.70}{100} + \frac{0.20* 0.80}{250}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{\frac{0.21}{100} + \frac{0.16}{250}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{0.0021+ 0.00064}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{0.00274}[/tex]

[tex]SE_{p_A-p_B} = 0.052[/tex]

Solving (a): Standard error using bootstrapping.

Following the below steps.

From the randomization sample, we have:

Sample A                          Sample B

[tex]x_A = 23[/tex]                              [tex]x_B = 57[/tex]

[tex]n_A = 100[/tex]                             [tex]n_B =250[/tex]

[tex]p_A = 0.230[/tex]                          [tex]p_A = 0.228[/tex]

So, we have:

[tex]SE_{p_A-p_B} = \sqrt{\frac{p_A * (1 - p_A)}{n_A} + \frac{p_A * (1 - p_B)}{n_B}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{\frac{0.23 * (1 - 0.23)}{100} + \frac{0.228* (1 - 0.228)}{250}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{\frac{0.1771}{100} + \frac{0.176016}{250}}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{0.001771 + 0.000704064}[/tex]

[tex]SE_{p_A-p_B} = \sqrt{0.002475064}[/tex]

[tex]SE_{p_A-p_B} = 0.050[/tex]

Answer:

b=109 degree

Step-by-step explanation:

26 + 45 + b=180 degree (being sum of interior angles of a triangle)

71 + b = 180

b=180-71

b=109 degree

Step-by-step explanation:

109°

I am.proooooooooooo

yeahhhhhhhhhh brooooooooooo

ask me anything

Answer:

Infinient amount buddy. They are infinent amounts of polygons, as a polygon is a shape with more then 3 sides and closed. This means as long as a number is bigger then 3, there will be a shape for it, so infinent sides

Step-by-step explanation:

Answer:

the answer is a. x+6<-8 I hope I'm correct

Answer: The answer is D

Step-by-step explanation:

You add z to the other side then it will cancel out which then it would be (w+z)  and then you times it by 2 by both sides which would be 2(w+z) and then you would subtract x from both sides which will be 2(w+z)-x

Hopefully this helps

Answer:

5 times

Step-by-step explanation:

Using visual inspection, the bar of North HS is 5 times longer Than the bar of West HS.

The gtids are of equal size, West HS occupies one portion of the grid, while North HS occupies 5 portions of the grid

5 portions / 1 portion = 5

Hence, North HS according to the graph is 5 times West HS

Answer:

Step-by-step explanation:

um yes..!

Answer:

20 units

Step-by-step explanation:

the perimeter = 7+4+4+5 = 20 units

Answer:

There will be no difference in pain ratings from people protected by her spell and people who aren't protected by her spell.

Step-by-step explanation:

The claim in this scenario is the alternative hypothesis, which is what we wish to test ; the alternative hypothesis is thus ; people who are protected by spell will rate their pain as a result of cruciatus curse as less severe than the average person who does not use her protection spell ;

As we know, the null hypothesis is the opposite of the alternative hypothesis and the initial truth, which is ;

The average pain felt by both the user of the pain protections spell and those who do not feel the same amount of pain.

Answer:

11/14

Step-by-step explanation:

(P of blue marble) + (P of even numbered) - (P blue and even) =

8/14 + 7/14 - 4/14 = 11/14

Answer:

Step-by-step explanation:

3x² + 6x + 2 = 0

Quadratic Formula is:

x = -b ± √b²- 4ac/2a

So...

Δ = b² - 4ac = 6² - 4.3.2 = 12

x = -6 ± √Δ/2.3 = -6 ± √12/6

x' = -6 + √12/6 ≈ -0,4227

x'' = -6 - √12/6 ≈ -1,5774

S = { -0,4227 , -1,5774 }

Answer:

CA = LJ

Step-by-step explanation:

The third side

CA = LJ

Answer:

CA=LG is correct answer

Answer:

y–y1 =m (X–X1)

y–2=3(x–4)

y=3x–10

Orthocenter is the best term to describes point R in the triangle UVW.

" Orthocenter is defined as intersecting point of the altitudes of the sides of the acute angle triangle."

According to the given figure,

In triangle UVW,

Ray VR perpendicular to UW

Ray UR perpendicular to VW

Ray WR perpendicular to UV

Altitudes of side  ( UV , VW, and WU) of triangle UVW intersect at

point R.

As per the definition of orthocenter , point R represents orthocenter.

Hence, orthocenter is the best term to describes point R in the triangle UVW.

Learn more about orthocenter here

https://brainly.com/question/19763099

#SPJ2

Answer:

its b

Step-by-step explanation:

Answer:

[tex]\sqrt{85}[/tex] /2

Step-by-step explanation:

lets find hypotenuse( longest side) first

let other two samller sides be a and b and hypotenuse be c

pythagorsd theorem

a^2 + b^2 =c^2

9^2 + 2^2 =c^2

81 + 4=c^2

85 =c^2

[tex]\sqrt{85}[/tex] =c

take theta as reference angle

cosec theta=hypotenuse/opposite

=[tex]\sqrt{85}[/tex] / 2

Answer:

Answer is B. CSC ∅ = √85 /2

Step-by-step explanation:

CSC = 1 / Sin ∅

So first find Sin ∅ = 2 / √ 85 and then substitute in the formula

And oh, in case you're wondering, √ 85 is the hypotenuse side which you find like this:

√ 9² + 2²

√ 81 + 4

√ 85

Answer:

720

Step-by-step explanation:

x÷18=40

x=18•40

x=720

Answer:

$40

Step-by-step explanation:

It's the value on the y-axis. (0 days)

Answer:

Alex is correct.

Step-by-step explanation:

In order for Alex to get to $0, meaning he owes the bank nothing, he has to add 155 dollars to negative 155 dollars, because this means he has no debt left. The absolute value of -155 is 155 and if Alex pays the 155 dollars, he will not have to pay anything else to the bank.

Answer: 40%

Step-by-step explanation:

Answer:

75

Step-by-step explanation:

what I did is that I added 6 and 2 (2 males and 6 women) so that's 8, then I put it as a fraction of 6/8, and I just searched what 6/8 as a percentage was :b  

I'm really sorry if u don't understand what I'm trying to say, I'm really bad when it comes to write in English x,d

Answer:

20 games are required to be play

Answer:

8/9 (decimal: 0.888889)

Answer:

[tex]2[/tex]

Two is the answer.

Step-by-step explanation:

simple explanation is; when you go through your two times table.. in order to arrive at eight, (8), you have to mention or go through 3 numbers

Or .... cube root of 8 is two..

PLEASE MARK ME BRAINIEST

Answer:

See image below:)

Step-by-step explanation:

9514 1404 393

Answer:

  (-3/4, 3)

Step-by-step explanation:

I find it easier to determine the intercepts when the equation is in standard form:

  4x -y = -6

The x-intercept is found where y=0:

  4x = -6   ⇒   x = -6/4 = -3/2

The y-intercept is found where x=0:

  -y = -6   ⇒   y = 6

Then the midpoint is ...

  M = ((-3/2, 0) +(0, 6))/2 = (-3/4, 3)

Answer: A

Step-by-step explanation:

Answer:

D: (2, -3)

Step-by-step explanation:

We have;

y = 3x - 9 - - - (1)

y = -2x + 1 - - - (2)

By substitution method, from eq 1, we see that: y = 3x - 9

Thus,let's put 3x - 9 for y in eq 2;

3x - 9 = -2x + 1

Rearranging to get;

3x + 2x = 9 + 1

5x = 10

x = 10/5

x = 2

Thus;

y = 3(2) - 9

y = 6 - 9

y = -3

Thus,the solution (x, y) = (2, - 3)