Find the value of 4 cubed

Answer:

Blocking in a paired design

Completed randomized design

Step-by-step explanation:

Orringer et. al used blocking in a paired design. He use the special type of randomized block design; a matched pair design wherein there is just two treatment conditions (laser treatment and the sham treatment) and the subjects are then group the subjects in pairs using the blocking variable which is a treatment applied to one side of face randomly chosen.

While Seaton et. al. used a completely randomized design. Here the subjects/participants are just merely assigned albeit randomly to either the laser or the sham treatment.

Answer:

8

Step-by-step explanation:

Answer:

8 and 6.

Step-by-step explanation:

2.86 has tenths and hundredths place.

After the decimal point is the tenths place and after the tenths place is hundredths place.

The number 8 is the tenths place and the number 6 is in the hundredths place.

Answer:

Step-by-step explanation:

(a)

From the given information; we can compute the null and the alternative hypothesis as follows:

[tex]H_o : \mu = 38[/tex]  

[tex]H_1 : \mu < 38[/tex]

Level of significance ∝ = 1% = 0.01

The critical values of t distribution since the sample size n = 20 is:

n - 1

= 20 - 1

= 19 degree of freedom

Assuming the population  is normally distributed:

The t test can be computed by using the EXCEL FUNCTION

  = TINV(0.01, 19 )

  = 2.539483

[tex]t_{0.01,19} = 2.539483[/tex]

However;

we were also given the sample mean X to be = 35 minutes

the standard deviation SD = 5 minutes

Thus; the test statistics can be computed as;

[tex]t = \dfrac{\bar X - \mu}{\dfrac{s}{\sqrt{n}}}[/tex]

[tex]t = \dfrac{35- 38}{\dfrac{5}{\sqrt{20}}}[/tex]

[tex]t = \dfrac{-3}{\dfrac{5}{4.472}}[/tex]

[tex]t_o = -2.6833[/tex]

The P-value P ( t < [tex]t_o[/tex]) = P(  t < - 2.633)

= 0.007355

P-value [tex]\approx[/tex] 0.0074

Decision Rule: If P - value is less than the level of significance; we are to reject the null hypothesis.

Conclusion: P-value < level of significance ; i.e 0.0074 < 0.01; so we reject the null hypothesis and accept the alternative hypothesis.

Thus; we conclude that the average time for assembling the computer board is less than 38 minutes at 0.01 level of significance.

b).

Given that:

Sample size n = 20

level of significance = 0.05

The population variance σ² is more than 22

Thus null hypothesis and the alternative hypothesis can be computed as follows:

[tex]H_0 : \sigma^2 = 22[/tex]

[tex]H_1 : \sigma^2 < 22[/tex]

From above;

degree of freedom  df = 19

The critical value of [tex]X^2[/tex] at df = 19 and ∝ = 0.05 is = 30.14353  at the right tailed region.

[tex]X^2_{0.05,19} =[/tex] 30.14353

The test statistics [tex]X^2[/tex]  for the sample variance is computed as:

[tex]X^2= \dfrac{(n-1 )s^2}{\sigma^2}[/tex]

[tex]X^2= \dfrac{(20-1 )25}{22}[/tex]

[tex]X^2= \dfrac{(19)25}{22}[/tex]

[tex]X^2= \dfrac{475}{22}[/tex]

[tex]X^2[/tex] = 21.5909

The P-value for the test statistics is :

= 1 - P( [tex]X^2[/tex] < 21.5909)

= 1 - 0.694914

= 0.305086

The P-value = 0.305086

Decision Rule: If P - value is less than the level of significance; we are to reject the null hypothesis.

Conclusion:  SInce the P-value is greater than the level of significance ; i.e

0.305086  > 0.05 ; Therefore; we  do not reject the null hypothesis.

Therefore the data does not have sufficient information to conclude that the population variance is more than 22 at 5% level of significance.

I hope that helps a lot.

Answer:

V ≈ 670.2 [tex]ft^3[/tex]

Step-by-step explanation:

Use the formula of the volume of a cone, which is [tex]V=\pi r^{2} \frac{h}{3}[/tex]

Plug in your given components and solve for V:

[tex]V=\pi (8)^2\frac{10}{3} \\V=\pi (64)\frac{10}{3} \\V=\pi (64)(3.33)\\V=\pi (213.33)\\V=670.2[/tex]

Answer:

There are no choices on your question

Step-by-step explanation:

Maybe 2/1 or 4/2 or 10/5.

Answer:

y= -6x-11

If y+2+(6x-9)=0

Step-by-step explanation:

y+2+(6x-9)=0? (I'm assuming)

Subtract 2 from both sides

y+(6x-9)= -2

Subtract (6x-9) from both sides

y= -2-(6x-9)

y= -2-6x-9

y= -6x-11

Answer:

  ΔHJK; Lines are drawn from each point to the opposite side to form right angles and the lines intersect at point G

Step-by-step explanation:

The orthocenter is the point of intersection of altitudes. Each altitude is orthogonal to the corresponding base, so the use of "ortho-" can help you remember.

The appropriate choice is ...

  ΔHJK shown: Lines are drawn from each point to the opposite side to form right angles and the lines intersect at point G.

Answer:

in short terms its D. i got it right

Step-by-step explanation:

Answer:

Step-by-step explanation:

Saying "put an equation into slope-intercept form" is another way of saying, "solve this equation for y". Not 6y or -3y...just plain old ordinary positive y. In order to begin that process, we need to first isolate the term that has the y in it. We do that by subtracting 6x from both sides to get

-3y = -6x + 18

Now, again, we are not solving for -3y, just y. We do that by dividing both sides by -3 to get

[tex]y=\frac{-6x}{-3}+\frac{18}{-3}[/tex]

Simplifying that gives us

y = 2x - 6

Answer:

2.5th percentile and the 97.5th percentile.

Step-by-step explanation:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1-0.95}{2} = 0.025[/tex]

So we obtain the 0.025*100 = 2.5th percentile and the (1-0.025)*100 = 97.5th percentile.

So the answer is:

2.5th percentile and the 97.5th percentile.

Answer:

x = -9

Step-by-step explanation:

Step 1: Write out expression

5(x + 13) = 20

Step 2: Distribute

5x + 65 = 20

Step 3: Isolate x

5x = -45

x = -9

And we have our answer!

Answer:

-9

Step-by-step explanation:

Let the number be x.

5(x+13) = 20

Expand.

5x+65 = 20

Subtract 26 on both sides.

5x = 20 - 65

5x = -45

Divide 5 into both sides.

x = -45/5

x = -9

The number is -9.

Answer:

90.35% probability that a test result will be negative

Step-by-step explanation:

We have these following probabilities:

0.05 = 5% probability that an individual adult has the disease.

If the adult has the disease, 1 - 0.98 = 0.02 = 2% probability of a negative test.

1 - 0.05 = 0.95 = 95% probability that an individual adult does not have the disease.

If the adult does not have the disease, 1 - 0.05 = 0.95 = 95% probability of a negative test.

What is the probability that a test result will be negative

2% of 5% or 95% of 95%. So

p = 0.02*0.05 + 0.95*0.95 = 0.9035

90.35% probability that a test result will be negative

Answer :

x1 = -1

x2= +3

x3 = +4

I hope it helps

If you are doing it by roots how ever it would be 3

Answer:

Step-by-step explanation:

Since the shots are independent, they have the same ratio across the row and down the column as the totals have. Ratios in the same row are 3:1; ratios in the same column are 4:1.

(1st shot, 2nd shot) = (makes, makes) = 144

  = (makes, misses) = 180-144 = 36

  = (misses, makes) = 192-144 = 48

  = (misses, misses) = 60-48 = 12

Answer:

V =100.48 cm^3

Step-by-step explanation:

The volume of a cone is given by

V = 1/3 pi r^2 h

V = 1/3 pi ( 4)^2 6

V = 1/3 pi ( 16)*6

V =32 pi cm^3

Let pi 3.14

V =100.48 cm^3

Answer:

Volume = [tex]100.48 \,\,cm^3[/tex]

Step-by-step explanation:

Recall that the volume of the cone is given by the formula:

[tex]Volume=\frac{1}{3} Base * Height[/tex]

that is, one third of the product of the triangles base area times the triangle's height. In this case, the area of the base is a circle of radius 4 cm which using the formula for the area of the circle gives:

[tex]\pi\,R^2=\pi\,(4\,\.cm)^2=16\,\pi\,\,cm^2[/tex]

using this expression for the base in the volume formula, as well as the height of the cone (6 cm) it renders:

[tex]Volume=\frac{1}{3} \,16\,\pi\,(6)\,\,cm^3=32\,\pi\,\, cm^3=100.48 \,\,cm^3[/tex]

Answer:

1:500000

Step-by-step explanation:

1 mm ​(map) equals 500 m ​(actual) .

Let's convert 500 m to mm.

1m = 1000mm

500m = 500000 mm

So 1mm to 500000mm on a scale is

1:500000

So it's all about converting the metre to million metre then doing the ratio.

In this case we are not to divide anything because it's already in 1.

So it's 1mm on paper then 500000mm on actual.

Thank you

Answer: Significantly low.

Step-by-step explanation:

Ok, we know that out of 1700 randomly selected, only 4 of them are girls.

Then the frequency is:

p = 4/1700

Now, using the subjective judgement (meaning that it is based on the opinion only, there is no real math involved)

I can conclude that the number of girls is significantly low, meaning that out of 1700 births we have 4 girls, then the other 1694 must be boys.

Answer:

To find a we use sine

sin 60° = a / 4√3

a = 4√3sin60°

a = 6

To find b we use sine

sin 45° = a / b

a = 6

b = 6 / sin 45°

b = 6√2

To find c we use cosine

cos 60° = c / 4√3

c = 4√3 cos 60°

c = 2√3

To find d we use tan

tan 45° = a / d

a = 6

d = 6 / tan 45°

d = 6

Therefore a = 6 b = 6√2 c = 2√3

d = 6

That's option A.

Hope this helps

Answer:

a = 49°

Step-by-step explanation:

OB = OC ( both radii of the circle ), thus

Δ BOC is isosceles and the base angles are congruent, that is

∠ OBC = ∠ OCB = 41° , so

∠ BOC = 180° - (2 × 41)° = 180° - 82° = 98°

The angle on the circumference BAC is half the angle at the centre for angles subtended on the same arc , thus

a = 0.5 × 98° = 49°

If the measure of the angle ∠BOC will be 98°. Then the measure of the angle ∠BAC will be 49°.

It is the close curve of an equidistant point drawn from the center. The radius of a circle is the distance between the center and the circumference.

The central angle is double the angle at the periphery that was subtended by the same chords.

The measure of the angle ∠BCO is 41°.

The angle ∠BCO and angle ∠CBO will be congruent. Because they are angles of an isosceles triangle.

We know that the sum of all the interior angles of the triangle will be 180°. Then the measure of the angle ∠BOC will be given as,

∠BOC + ∠CBO + ∠BCO = 180°

∠BOC + 41° + 41° = 180°

∠BOC = 98°

Then the measure of the angle ∠BAC will be

∠BAC = (1/2) ∠BOC

∠BAC = 1/2 x 98°

∠BAC = 49°

If the measure of the angle ∠BOC will be 98°. Then the measure of the angle ∠BAC will be 49°.

More about the circle link is given below.

https://brainly.com/question/11833983

#SPJ2

Answer:

1.  x = 4

2. x = -1

3. x = 0

Answer:

Step-by-step explanation:

Answer:

I don't know

Step-by-step explanation:

sorry I can't help,use a calculator

Answer:

58.5 miles

Step-by-step explanation:

Let's Use unitary Method

8 hours = 52 miles

Then,

1 hour = 52/8 miles

1 hour = 6.5 miles

Multiplying both sides by 9, We'll get

9 hours = 6.5 × 9 miles

9 hours = 58.5 miles

Answer: 15

Step-by-step explanation:

(gоf)(4) means g of f of 4. You would plug in f(4) into g(x).

f(4)=(4²)-3=16-3=13

Now that we know f(4) is 13, we would plug in 13 to g(x).

g(13)=13+2=15

Answer:

E(x), σx

Step-by-step explanation:

We have to x be their average annual income we need to find p ( x => 50000)

To find this probability we need  E(x), σx

For we find p ( x => 50000) we find the z value for 50000, ie the # of standart deviations that 50000 is away form   E(x)

z = (x  -  E(x)/σx)

now  p ( x => 50000) = p (z => (x  - E(x)/σx )

hence we can say that, to find p ( x => 50000) we need the parameters E(x), σx

Answer:

I would say the second one

Step-by-step explanation:

f(x) has a range of y<0, because it is reflected over the x axis

g(x) = -5/7(3/5)^-x is also reflected over the x axis, except also in the y axis. Regardless of the reflection in the y-axis, y still cannot be equal to or greater than 0. Therefore, I believe it is the second choice.

(The third and forth choice are the same, which rules them both out. The first on reflects it over the y-axis, meaning that x can be greater than 0.)

Answer:

Step-by-step explanation:

x         6         a

8       48        c  

-4        b       20

Let the unknown numbers of the multiplication grid are a, b and c.

1). 6 × 8 = 48

2). (-4)×6 = b

    b = -24

3). (-4) × a = 20

   a = -5

4). 8 × a = c

    8 × (-5) = c

    c = -40

Therefore, missing in the given multiplication grid are,

x         6        -5

8       48       -40  

-4      -24       20

Answer:

It will have a population of 61,779 in 2000.

Step-by-step explanation:

The population for the city, in t years after 1900, can be modeled by a exponential function with constant growth rate in the following format:

[tex]P(t) = P(0)(1+r)^{t}[/tex]

In which P(0) is the population in 1900 and r is the growth rate.

Population of 24,000 in 1900

This means that [tex]P(0) = 24000[/tex]

Population of 29,000 in 1920.

1920 is 1920 - 1900 = 20 years after 1900.

This means that P(20) = 29000. So

[tex]P(t) = P(0)(1+r)^{t}[/tex]

[tex]29000 = 24000(1+r)^{20}[/tex]

[tex](1+r)^{20} = \frac{29000}{24000}[/tex]

[tex]\sqrt[20]{(1+r)^{20}} = \sqrt[20]{\frac{29000}{24000}}[/tex]

[tex]1 + r = 1.0095[/tex]

So

[tex]P(t) = P(0)(1+r)^{t}[/tex]

[tex]P(t) = 24000(1.0095)^{t}[/tex]

What population will it have in 2000

2000 is 2000 - 1900 = 100 years after 1900. So this is P(100).

[tex]P(t) = 24000(1.0095)^{t}[/tex]

[tex]P(100) = 24000(1.0095)^{100} = 61779[/tex]

It will have a population of 61,779 in 2000.

Answer:

[tex]y=60^\circ[/tex]

Step-by-step explanation:

[tex]m\angle y\:=\:\frac{1}{2}\:m \angle {120^\circ}\\\\=60^\circ[/tex]

Best Regards!

Answer:

[tex] P(X>14)= 1-P(X<14) =1- F(14)[/tex]

And replacing we got:

[tex] P(X>14)= 1- \frac{14-8}{22-8}= 0.5714[/tex]

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

Step-by-step explanation:

We define the random variable of interest as x " time it takes a barber to complete a haircuts" and we know that the distribution for X is given by:

[tex] X \sim Unif (a= 8, b=22)[/tex]

And for this case we want to find the following probability:

[tex] P(X>14)[/tex]

We can find this probability using the complement rule and the cumulative distribution function given by:

[tex] P(X<x) = \frac{x-a}{b-a} ,a \leq x \leq b[/tex]

Using this formula we got:

[tex] P(X>14)= 1-P(X<14) =1- F(14)[/tex]

And replacing we got:

[tex] P(X>14)= 1- \frac{14-8}{22-8}= 0.5714[/tex]

The probability that a randomly selected barber needs at least 14 minutes to complete the haircut is 0.5714

Answer: SAS

Step-by-step explanation:

Explanation:

It looks like you're trying to make the coherent statement ...

  The average rate of change over the interval [a, x] is ...

     [tex]\dfrac{f(x)-f(a)}{x-a}[/tex]

  The limit ...

     [tex]\lim\limits_{x \to a}{\dfrac{f(x)-f(a)}{x-a}}[/tex]

  is the slope of the line. It is also the limit of the average rate of change, which is the instantaneous rate of change at x=a.