Erin wants to know if warming up will help runners sprint faster. Twenty-six track and field athletes volunteered to participate in her study. She randomly assigns 13 athletes to warm-up for 10 minutes. All 26 participants sprint the same distance. She calculates the mean for each group and determines that the mean for the warm-up group was 10.9 seconds, and the mean for the other group was 12.9 seconds. To test the difference of means she re-randomized the data 54 times, and the differences are plotted in the dot plot below. What can Erin conclude from her study? (6 points) A dot plot is shown labeled from negative 2.5 to positive 2. Above the negative 2.5 are 3 dots. Above the negative 2 are 6 dots. Above the negative 1.5 are 9 dots. Above the negative 1 are 12 dots. Above the negative 0.5 are 6 dots. Above the 0.0 are The difference in the means is not significant because a difference of 2 is not very likely. The difference in the means is not significant because a difference of 2 is very likely. The difference in the means is significant because a difference of 2 is very likely. The difference in the means is significant because a difference of 2 is not very likely.

Answer:

I think D

Step-by-step explanation:

I think mean is center, or the center of the data. Range is the spread of data, or how far it is spread.

Answer:

6. B

7. D

Step-by-step explanation:

[tex]\sqrt{4}[/tex] = 2

Point A Before: ( 1 , 3 )

1 - 4 = -3

3 - 2 = 1

( -3 , 1 )

hope this helps

ok, So we know the length of  4/6 of the sides.....the ones we know are:

-4ft

-3ft

-9ft

-10ft

now to find the two missing sides.......we can see that one side is 5 because the other half is 4 ....which we already counted,.... (I'm talking about the unmeasured side over 9ft). Now to find the second...(the one closer to 10) since the already counted side is three and it's over 10 it has to be 7. so our missing ones are:

-7ft

-5ft

Now to add them together:

4+3+9+10+7+5=38

Lastly: REMEMBER TO ADD THE UNIT OF MEASUREMENT!!! Feet!!

That makes our answer 38ft!!

This means answer D or the last one is correct!!

HOPE I HELPED!!! HAVE AN AMAZING DAY/NIGHT!!!! PLEASE GIVE ME BRAINLIEST IF I HELPED YOU!!!

Answer:

38 feet.

Step-by-step explanation:

The length of the unmarked vertical side is 10 - 3 = 7 feet.

The length of the unmarked horizontal side is = 9 - 4 = 5 feet.

The perimeter = sum of the lengths of the sides

= 10 + 4 + 7 + 5 + 3 + 9

=  38 feet.

Answer: c

Step-by-step explanation:

Answer:

again, did some reading, they make note of continuing battle to support Serbia. I saw nothing of Japan. so my calculated guess would be the 2nd one. to continue in battle even with heavy casualties

Step-by-step explanation:

doesn't mean I'm right though.

Question is not complete, so i have attached it.

Answer:

B: -2x² - 6x² - 6x + 3x + 3 + 2

Step-by-step explanation:

From the image attached, the given polynomial is;

3 - 6x - 2x² + 3x - 6x² + 2

For like terms to be next to each other, we have to rearrange it as follows;

-2x² - 6x² - 6x + 3x + 3 + 2

Like terms are x² and x, thus they are now arranged next to each other.

The only option that corresponds to our answer is option B

Answer:

30, 130

Step-by-step explanation:

sum of internal angles in a quadrilateral is 360.

sum of other two angles

[tex] = 360 - (120 + 110) \\ = 360 - 230 \\ = 130[/tex]

Answer:

[tex]\frac{5xz}{3y^{2} }[/tex]

Step-by-step explanation:

Answer:

Step-by-step explanation:

i is a good game and a good idea but it needs more people who are not the only ones that they were playing in a few weeks ago i dont have a game on joke

Answer: 2

Step-by-step explanation:

Change the divisor 4.5 to a whole number by moving the decimal point 1 places to the right. Then move the decimal point in the dividend the same, 1 places to the right.

We then have the equations:

90 ÷ 45 = 2

and therefore:

9 ÷ 4.5 = 2

Answer:

Step-by-step explanation:

11x - 2° = 75° ( being corresponding angles )

11x = 75° + 2°

11x = 77°

x = 77°/ 11

x = 7°

hope it helps :)

Answer:

D 40°

Step-by-step explanation:

52= X + 64 /2

*2.      *2

104 = X + 64

-64        -64

40 =X

Answer:

Step-by-step explanation:

Everything is right except the second one. It is acute as all the angles are under 90 degrees.

A)obtuse

B)acute

C)right

D) right

Step-by-step explanation:

PRUEBA DE HIPÓTESIS” CONTROL ESTADÍSTICO DE PROCESOS “PRUEBA DE HIPÓTESIS” IV – “A”

2. 2 “PRUEBA DE HIPÓTESIS” "AÑO DE LA PROMOCIÓN DE LA INDUSTRIA RESPONSABLE Y DEL COMPROMISO CLIMÁTICO" UNIVERSIDAD NACIONAL “SAN LUIS GONZAGA” DE ICA FACULTAD DE ADMINISTRACIÓN “PRUEBA DE HIPÓTESIS” Curso : CONTROL ESTADÍSTICO DE PROCESOS Doctor : Dr. ORLANDO GABRIEL HERNÁNDEZ Año : IV - “A” Turno : MAÑANA Autores : CARRILLO MAMANI, GERALD FLORES JAUJE, LUIS HUARIPAUCAR GAMBOA, SONIA OCHOA SUAREZ, GIUSEPI 2014

3. 3 “PRUEBA DE HIPÓTESIS” INTRODUCCIÓN Es evidente que las distribuciones muestrales, vistas en el capítulo anterior, basadas en la teoría de la distribución normal, desarrollan un papel de gran importancia en la inferencia estadística. La inferencia estadística comprende dos partes principales, a saber: la estimación de parámetros y la prueba o docimasia de hipótesis. En este capítulo estudiaremos la segunda de ellas, con el fin de desarrollar métodos y observar su aplicación a problemas corrientes de la vida diaria. La inferencia estadística está basada en el supuesto de tomar muchas muestras, todas con igual probabilidad de ser seleccionadas y a través de una de ellas sabremos algo acerca de la población, mediante el cálculo de estimadores, que nos permitan hacer aseveraciones, incorrectas algunas veces, estableciéndose la probabilidad de error. Este método se basa en la aplicación de técnicas de muestreo, para lo cual se requiere de un buen diseño, además de la aplicación de métodos aleatorios de selección, cuando las probabilidades son iguales para cada elemento de una población. En algunos casos no requieren ser iguales, siempre que se conozcan y sean diferentes a cero. CONTENIDO  Conceptos generales, usos y procedimientos de aplicación.  Pruebas de hipótesis con aplicaciones en distribuciones de: Medias, Proporciones.  Teoría de las muestras pequeñas. Distribución “t” de

Answer:

y=3x-5

Step-by-step explanation:

so step by step would go like this

1) add Y to the opposite side

3x=Y+5

2)Subtract 5 from the side with Y

y=3x-5

Answer:

Need a pic to answer your question

Answer:

m<C can not be computed

Step-by-step explanation:

m∠A = 50°, c = 25, a = 19, m∠C=?

Using the Sine Law

a/sin m<A = c/sin m<C

Substitute the given values

19/sin50 = 25/sinC

19sinC = 25sin50

19sinC = 19.1511

sinC = 19.1511/19

sinC = 1.0079

C =  arcsin1.0079

Hence m<C can not be computed

Answer:

31°

Step-by-step explanation:

The sum of interior angles in a triangle is equal to 180° we can calculate the measure of missing angles using this information

The given triangles are isosceles I have drawed the on the shape, check out the attachment olease.

y = -9

Ok so to write the equation of the line you will need the slope and y-intercept. Since we are given two-point we can easily find the slope by using this equation for slope formula:

[tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

So now that we have our equation we can just plug in the numbers:

[tex]\frac{(-9)-(-9)}{5-(-3)}[/tex]

After subtracting you should get:

0/8

Since zero is in the numerator and you can't divide zero by anything, the slope is 0. We still need the y-intercept for the equation however since the slope is 0 there is no need to put anything else.

Then to find the y-intercept all you have to do is plug in one of the coordinatines into the slope equation to solve, for example, using the point (5,-9):

[tex](-9) = 5(0) + b[/tex]

B is the variable for the y-intercept. Also notice how I put 0 as our slope into the equation. Now all you have to do is solve for b. Which you would get b = -9. Since you have your slope and your y-intercept now you just write out your equatoin for the line which is:

y = 0x - 9

**Just write it as

y = -9

Answer:

Y = -9

Step-by-step explanation:

You're welcome and have a nice day

Answer:

Step-by-step explanation:

Sum of exterior angles of any polygon =360°

Sum of exterior angles of polygon = 360°

m + 5  + 2m + 3 + 3m + 2 + 4m + 1 + 5m + 4 = 360

m + 2m + 3m + 4m + 5m + 5 + 3 + 2 + 1 + 4  = 360  {Combine like terms}

15m + 15 = 360 {Subtract 15 from both sides}

        15m = 360 - 15

        15m = 345 {Divide both sides by 15}

           m = 345/15

m = 23

m + 5 = 23 + 5 = 28°

2m + 3 = 2*23 + 3 = 46 + 3 = 49°

3m + 2 = 3*23 + 2 = 69 + 2 = 71°

4m + 1 = 4*23 + 1 = 92 + 1 = 93°

5m + 4 = 5*23 + 4 = 115 + 4 = 119°

Answer:

see explanation

Step-by-step explanation:

The sum of the exterior angles of a polygon = 360°

Sum the angles and equate to 360

m + 5 + 2m + 3 + 3m + 2 + 4m + 1 + 5m + 4 = 360, that is

15m + 15 = 360 ( subtract 15 from both sides )

15m = 345 ( divide both sides by 15 )

m = 23

Then

m + 5 = 23 + 5 = 28°

2m + 3 = 2(23) + 3 = 46 + 3 = 49°

3m + 2 = 3(23) + 2 = 69 + 2 = 71°

4m + 1 = 4(23) + 1 = 92 + 1 = 93°

5m + 4 = 5(23) + 4 = 115 + 4 = 119°

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

Answer: z=22

Explanation:

9^2 + z = 103

81 + z = 103

103 - 81 = z

22 = z

I hope this helped!

<!> Brainliest is appreciated! <!>

- Zack Slocum

*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆*――*☆**☆*――*☆*――*☆*――*☆

~~Answer~~

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The answer you seek is z = 22. :3 Step by step explanation is best explained by the user above. Hope we helped! :D

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Answer:

the volume of the rectangular prism is 90 cm^2

Step-by-step explanation:

The computation of the volume of the rectangular prism is shown below:

Given that

The volume in a single layer is 18 cubic centimeters

And, there are 5 layers in the rectangular prism

So based on the above information

The volume of the rectangular prism is

= 5 ×18 cubic centimeters

= 90 cm^2

Hence, the volume of the rectangular prism is 90 cm^2

Answer:  The two angles add up to 180 so they are supplementary angles.  

The sum of their measures is 180 degrees.

Step-by-step explanation:

Plug in given value for x.  

x=20

(3x+50)=

(60+50)=110

110

(4x-10)=

80-10=70

70

There are several true things about these angles you can find from this information but I think you are looking for the answer at top.

Answer:

gang

Step-by-step explanation:

Answer:

Thanks so much!!

Step-by-step explanation:

Answer:

2nd option

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]

with (x₁, y₁ ) = (- [tex]\frac{3}{2}[/tex], 0) and (x₂, y₂ ) = (0, [tex]\frac{3}{4}[/tex] )

m = [tex]\frac{\frac{3}{4}-0 }{0+\frac{3}{2} }[/tex] = [tex]\frac{\frac{3}{4} }{\frac{3}{2} }[/tex] = [tex]\frac{1}{2}[/tex] and c = [tex]\frac{3}{4}[/tex] , then

y = [tex]\frac{1}{2}[/tex] x + [tex]\frac{3}{4}[/tex] ( multiply through  by 4 to clear the fractions )

4y = 2x + 3 ( subtract 4y from both sides )

0 = 2x - 4y + 3 , that is

2x - 4y + 3 = 0 ← equation of line

Answer:

exact form= 29/50

decimal form= 0.58

percent form= 58%

Step-by-step explanation:

Answer:

58%

Step-by-step explanation:

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