A part manufactured at a factory is known to be 12.05 cm long on average, with a standard deviation of 0.119. One day you suspect that that the part is coming out a little longer than usual, but with the same deviation. You sample 19 at random and find an average length of 12.25. What is the z-score which would be used to test the hypothesis that the part is coming out longer than usual?

Answers

Answer 1

Z-score is used to test the hypothesis that the part is coming out longer than usual. Z-score is defined as the number of standard deviations away from the mean.

It is calculated using the formula z = (x - μ) / σ, where x is the sample mean, μ is the population mean, and σ is the population standard deviation. In the given problem, the population mean is μ = 12.05 cm and the population standard deviation is σ = 0.119 cm. The sample mean is x = 12.25 cm. The sample size is n = 19.

Therefore, the formula to calculate the z-score is Z = (x - μ) / (σ / √n) Substituting the values, we get z = (12.25 - 12.05) / (0.119 / √19) ≈ 6.586Therefore, the z-score which would be used to test the hypothesis that the part is coming out longer than usual is approximately 6.586.

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Related Questions

The height and radius of the cylinder are the same. If the volume of the cylinder 64π cm3. Using the formula, Volume of Cylinder = πr2h, what is the radius of the cylinder?

Answers

The radius of the cylinder, given that cylinder has a volume of 64π cm³, is 4 cm

How do i determine the radius of the cylinder?

The radius and the height of the cylinder can be obtained as illustrated below:

Volume of cylinder (V) = 64π cm³Radius of cylinder (r) = ?

The volume of a cylinder is given as

Volume (V) = πr²h

But,

Height (h) = radius (r),

Thus, we have

Volume (V) = πr² × r

Volume (V) = πr³

Inputting the given parameters, we can obtain the radius as follow:

64π =  πr³

Divide both sides by  π

r³ = 64π / π

r³ = 64

Take the cube root of both sides

r = ³√64

r = 4 cm

Thus, we can conclude from the above calculation that the radius of the cylinder is 4 cm

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1-38 At the farmers’ market, two pounds of peaches cost $4.20. How much will five pounds cost?
plz I need help!

Answers

Answer:

$10.50

Step-by-step explanation:

If 2 pounds of peaches costs $4.20 then you would divide by 2 to find how much 1 pound costs. After I divided I got $2.10. $8.40 is 4 pounds. If we add one more we get 5. So add $2.10 to $8.40 and you get $10.50. Hope this helps! <3

Evaluate the expression: 6(a + b) where a = -3 and b = 6

Answers

Answer here you go

Step-by-step explanation:

(-3 x 6 = -18)

6 x -18= -108

multiplication with postive and gegitives rule of thumb

negative times a positive equals a negative

negitive times a negative equals a positive

Use elimination to solve the system 6x – 3y = 2 and 2x – 9y = -2

Answers

Answer:

x = 1/2

y = 1/3

Step-by-step explanation:

6x – 3y = 2 (Multiply this by -3)

2x – 9y = -2

-18x + 9y = -6

2x – 9y = -2

-16x = -8

x = 1/2

2x – 9y = -2

2(1/2) - 9y = -2

1 - 9y = -2

-9y = -3

y = 1/3

i neen help plz ill give brainliest

i neen help plz ill give brainliest

Answers

Answer:

2/5

Step-by-step explanation:

Dave is a builder. Yesterday he made mortar mix. He used 24kg of sand and 5kg of cement. Today he needs to make the same type of mortar mix, but he will use 36kg of sand. How much cement does he need?

Answers

Answer:

7.5 kg

Step-by-step explanation:

Ratio of sand to cement = 24kg : 5kg

Today he needs to make the same type of mortar mix, but he will use 36kg of sand.

Let

x = quantity of cement used

Ratio of sand to cement = 36 kg : x kg

Equate both ratios

24 kg : 5 kg = 36 kg : x kg

24/5 = 36/x

Cross product

24 * x = 5 * 36

24x = 180

x = 180/24

x = 7.5

x = quantity of cement used = 7.5 kg

I need help on the last two finding the function notation

I need help on the last two finding the function notation

Answers

\(f(x)=3x+5\)\(\begin{gathered} f(f)=3(3x+5)+5 \\ f(f)=(3\cdot3x)+(3\cdot5)+5 \\ f(f)=9x+15+5 \\ f(f)=9x+20 \end{gathered}\)

For the second before last f(f), you have to replace x with the function f(x).

For the last one you have to replace x with the function g(x)

\(g(x)=2x^2+1\)\(\begin{gathered} f(g)=3(2x^2+1)+5 \\ f(g)=(3\cdot2x^2)+(3\cdot1)+5 \\ f(g)=6x^2+3+1 \\ f(g)=6x^2+4 \end{gathered}\)

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER!! Determine the Value of K in the diagram ( secant lines to circles).

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER!! Determine the Value

Answers

Answer:

6

Step-by-step explanation:

5

Answer:

k = 10

Step-by-step explanation:

Given 2 secants from an external point to the circle, then

The product of the external part and the whole of one secant is equal to the product of the external part and the whole of the other secant, that is

2x(2x + kx) = 3x(3x + 5x)

4x² + 2kx² = 3x × 8x = 24x² ( subtract 4x² from both sides )

2kx² = 20x² ( divide both sides by 2x² )

k = 10


Debra runs each lap in 8 minutes. She will run more than 40 minutes today. What are the possible numbers of laps she will run today?

Answers

Answer

At least 5 laps

Step-by-step explanation:

Divide by 8 on both sides

She will run at least 5 laps! I hope this helps! :)

Make a conjecture about the diagram below. Is AC greater than, less than, or equal to BC? Explain your reasoning.

Triangle A C B is sitting on horizontal line X Y. Points A and B of the triangle are on the line. Angle C B Y is 90 degrees.

Answers

Answer:

AC is greater than BC because segment AC is the hypotenuse of right triangle ABC, and the hypotenuse is the longest side of a right triangle.

The hypotenuse is the longest side of the triangle. Side AC of the triangle is its hypotenuse, thus greater than BC (segment and angle theorem of a triangle).

A triangle is a shape with three side and angles. Its longest side is referred to as hypotenuse. And this side is usually opposite to the greatest angle. Examples of triangle include: equilateral, isosceles, acute, right angles, obtuse angle etc.

The given question shows that triangle ACB is a right angled triangle. This is because <CBY = \(90^{o}\).

So that;

<CBY + <CBA = \(180^{o}\)

Now comparing side AC with BC:

The segment and angle theorem of a triangle states that: the longest side of a triangle is always opposite to the greatest angle.

Thus, since <CBA is the greatest of the angles here, then AC is the longest side.

Therefore, the side AC is the hypotenuse of the triangle and it is greater than BC.

A sketch to this question is attached to this answer for more clarifications.

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Make a conjecture about the diagram below. Is AC greater than, less than, or equal to BC? Explain your

2Photographers should double check that your camera is assigning the Adobe RGB profile to your file rather than sRGB for better color quality. True False

Answers

The statement "Photographers should double check that your camera is assigning the Adobe RGB profile to your file rather than sRGB for better color quality" is False.

Photographers should double check that their camera is assigning the appropriate color profile based on their intended output and workflow. The choice between Adobe RGB and sRGB depends on various factors such as the final output medium (print or web), color gamut requirements, and post-processing preferences. Adobe RGB has a wider color gamut than sRGB, making it suitable for high-quality prints and professional workflows.

On the other hand, sRGB is a standard color space used for web and general-purpose applications to ensure consistent color display across devices. It is essential for photographers to understand the color profiles and choose the one that best suits their specific needs.

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There are 15 cats at a pet shelter. The ratio of cats to dogs is 3:5. How many dogs are at the shelter?

Answers

\(\begin{gathered} \text{There are 15 cats.} \\ \text{The ratio of cats to dogs is 3 : 5} \\ \text{If there are d number of dogs, then you have } \\ 15\colon d \\ \text{Therefore,} \\ 3\colon5=15\colon d \\ \frac{3}{5}=\frac{15}{d} \\ \text{Cross multiply and you have;} \\ 3d=5\times15 \\ 3d=75 \\ \text{Divide by 3} \\ \frac{3d}{3}=\frac{75}{3} \\ d=25 \end{gathered}\)

Therefore, you have 25 dogs at the shelter.

Answer:

25

Step-by-step explanation:

We can take our ratio of 3:5 and multiply it by 5 to give us the number of cats we have. We get 15:25. Meaning we have 25 dogs.

Which expression is equivalent to 24(807). A 20(8)+4(8)+20(7)+

Which expression is equivalent to 24(807). A 20(8)+4(8)+20(7)+

Answers

Answer:

C

Step-by-step explanation:

807 is equal to 800 + 7, and 24 is equal to 20 + 4. Using the distributive property, we get 20(800) + 4(800) + 20(7) + 20(7)

Answer:

C

Step-by-step explanation:

Because 24*807 in distributive property is C

What is the last step made in constructing an angle that is congruent to another angle?
A. Draw a line segment from the point so that it goes through the intersection of the two arcs.

B.Find width of the given angle by using the compass and copy that distance on to the second arc drawn on the line segment.

C. Draw a line segment and place an arbitrary point on the line segment.

D.Draw congruent arcs on both the given angle and on the new line segment.

Answers

Answer:

Step-by-step explanation:

What is the last step made in constructing an angle that is congruent to another angle?A. Draw a line

URGENT PLEASE PLEASE ANSWER THIS QUESTION PLEASE IM BEGGING ANYONE ILL GIVE YOU BRAINLIEST.

URGENT PLEASE PLEASE ANSWER THIS QUESTION PLEASE IM BEGGING ANYONE ILL GIVE YOU BRAINLIEST.

Answers

Answer: Last one

Step-by-step explanation:

For what value of q is the equation –13(q + 4) = 7q + 16 true?

Answers

Hello! :)

\(\large\boxed{q = -3.4}\)

-13(q + 4) = 7q + 16

Distribute the coefficient outside of the parenthesis:

-13(q) - 13(4) = 7q + 16

Simplify:

-13q - 52 = 7q + 16

Isolate for q by subtracting 7q from both sides:

-13q - 7q - 52 = 7q - 7q + 16

-20q - 52 = 16

Add 52 to both sides:

-20q - 52 + 52 = 16 + 52

-20q = 68

Divide both sides by -20:

-20q / (-20) = 68 / (-20)

q = -3.4

AnswEr :

⠀⠀⠀⠀

The value of q is -3.4

⠀⠀⠀⠀

______________________

⠀⠀⠀⠀

➤ How to solve ?

⠀⠀⠀⠀

That's quite easy but you need to recall the BODMAS rule .

⠀⠀⠀⠀

BODMAS rule states the correct sequence to solve an equation . First we need to solve the bracket part then solve if any of is present moving further to division then multiplication carrying with addition atlast subtraction

⠀⠀⠀⠀

In this equation we will solve the bracket then we will apply further BODMAS rule

⠀⠀⠀⠀

━━━━━━━━━━━━━━━━━

SolutiOn :

➠ - 13 ( q + 4 ) = 7q + 16

➠ -13q - 52 = 7q + 16

Now, we will bring the variable on left hand side and constants on right hand side

➠ -13q - 7q = 52 + 16

➠ -20q = 68

➠ q = 68/ -20

➠ q = 34/-10

As we have 10 in the denominator we can directly put the decimal .

➠ q = -3.4

∴ The value of q is - 3.4.

━━━━━━━━━━━━━━━━━

pls help me with annoying sparx maths questions
and ill mark u as brainiest

pls help me with annoying sparx maths questionsand ill mark u as brainiest

Answers

I think its 54° because if you add all the other angles up you get 306 and there’s 360° in a quadratic shape so
360-306=54

Kalyn invited 24 friends to her birthday party. The
number of female friends was 6 more than twice
the number of her male friends. Write the system
of equations that can be used to find the number
of male and female friends and then solve the
system.

Answers

Answer:

Number of males = 6

Number of females = 18

Step-by-step explanation:

Total friends kalyn invited to her party = 24

The number of female friends was 6 more than twice the number of her male friends.

Let

Number of male friends at the party = x

Number of female friends at the party = 2x + 6

Equations that can be used to find the number of male and female friends

Total people at the party = Number of male friends + Number of female friends

24 = x + (2x+6)

24 = x + 2x + 6

Subtract 6 from both sides

24 - 6 = x + 2x + 6 - 6

18 = x + 2x

18 = 3x

Divide both sides by 3

x = 18 / 3

= 6

x = 6

Number of males = 6

Number of females = 2x + 6

= 2(6) + 6

= 12 + 6

= 18

Total people at the party= 6 + 18

= 24

The geometry of the clf3 molecule is best described as
a. distorted tetrahedral.
b. tetrahedral.
c. trigonal pyramidal.
d. trigonal planar.
e. t-shaped.

Answers

Answer:

The right option is option e.T-shaped.

Step-by-step explanation:

The molecular geometry or shape of clf3 is T-shaped. It acquires such shape because of presence of two lone pairs which take equatorial position and there are greater repulsions. The hybridisation is sp3d and it has 2 lone pairs

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The geometry of the clf3 molecule is best described as a. distorted tetrahedral. b. tetrahedral. c. trigonal

Option e) T-shaped

Hybridization in chemistry is defined as the concept of mixing two atomic orbitals to create a new type of hybridized orbital.

This mixing often leads to the formation of hybrid orbitals of different energies, shapes, etc. completely different.

During  hybridization, atomic orbitals of equivalent energies are mixed  and mainly involves the fusion of two "s" or two "p" orbitals, or the mixing of "s" orbitals with the "p"" orbitals as well as "s` orbitals with  `d` orbitals.

The newly formed orbitals are called hybrid orbitals.

The shape or molecular geometry  of ClF₃ is T-shaped. It acquires such a shape due to the presence of two lone pairs in the equatorial position and has greater repulsion. The hybrid is sp³d and it has 2 lone pairs.

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What is the equation of the circle with center (16, - 12) and a radius of 5

Answers

Answer:

x^2+y^2-32x+24y+375=0

Step-by-step explanation:

Equation of circle with given centre (h,k) and radius=r is

(x-h)^2+(y-k)^2=r^2

Given centre are=(16, - 12) and radius= 5

So equation of circle=

(x-16)^2+(y- -12)^2=5^2

x^2-32x+256+y^2+24y+144=25

x^2+y^2-32x+24y+375=0

Answer

Someone mind helping me with this?

Someone mind helping me with this?

Answers

Answer:

C or x+16= 31

Step-by-step explanation:

H. Cochran, Inc., is considering a new three-year expansion project that requires an initial fixed asset investment of $2,350,000. The fixed asset will be depreciated straight-line to zero over its three-year tax life, after which time it will be worthless. The project is estimated to generate $2,590,000 in annual sales, with costs of $1,610,000. Assume the tax rate is 21 percent and the required return on the project is 11 percent. What is the project’s NPV?

Answers

The  NPV of the project is $331,085.70. Since the NPV is positive, the project should be undertaken as it creates value for the company.

To calculate the NPV of the project, we need to estimate the cash flows generated by the project and discount them back to their present value using the required return of 11 percent.

The annual cash inflows generated by the project are the annual sales of $2,590,000 minus the annual costs of $1,610,000, which equals $980,000. We can calculate the annual depreciation expense as the initial fixed asset investment of $2,350,000 divided by the three-year tax life, which equals $783,333 per year.

Using the straight-line depreciation method, the fixed asset will have a book value of $1,566,667 (i.e., $2,350,000 - $783,333) at the end of year 3, which is equal to its estimated salvage value. Therefore, the after-tax salvage value is:

($1,566,667 - $0) x (1 - 0.21) = $1,235,000

Now we can calculate the annual after-tax cash flows:

Year 1: $980,000 - $301,667 = $678,333
Year 2: $980,000 - $301,667 = $678,333
Year 3: $980,000 - $301,667 + $1,235,000 = $1,913,333

where $301,667 is the annual depreciation expense.

To calculate the NPV, we need to discount these cash flows back to their present value at the required return of 11 percent. Using a financial calculator or spreadsheet software, we find that the NPV of the project is:

NPV = -$2,350,000 + $678,333/(1+0.11)^1 + $678,333/(1+0.11)^2 + $1,913,333/(1+0.11)^3 = $331,085.70

Therefore, the NPV of the project is $331,085.70. Since the NPV is positive, the project should be undertaken as it creates value for the company.

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Maria is currently taking quantitative literacy course. The instructor often gives quizzes. Each quiz is worth
10 points. Maria got the following scores: 10, 9, 10, 9, 10.
(a) Calculate the average of her quizzes. Round your answer to the nearest tenth (if needed).
(b) Calculate standard deviation of her quizzes. Round your answer to the nearest tenth.

Answers

Maria's average quiz score is 9.6.

B. The standard deviation of her quizzes is approximately 0.5 (rounded to the nearest tenth).

What is the average?

(a) The average of Maria's quizzes can be found by adding up all her scores and dividing by the total number of quizzes:

Average = (10 + 9 + 10 + 9 + 10) / 5 = 9.6

Therefore, Maria's average quiz score is 9.6.

(b) To calculate the standard deviation of her quizzes, we first need to find the variance. We can do this by finding the average of the squared differences between each score and the mean:

[(10 - 9.6)² + (9 - 9.6)² + (10 - 9.6)² + (9 - 9.6)² + (10 - 9.6)²] / 5 = 0.24

So the variance is 0.24. To find the standard deviation, we take the square root of the variance:

√0.24 ≈ 0.5

So the standard deviation of her quizzes is approximately 0.5 (rounded to the nearest tenth).

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What is the value of x in this triangle?
Enter your answer in the box.
X = ?

What is the value of x in this triangle?Enter your answer in the box. X = ?

Answers

Step-by-step explanation:

Sum of angles in a triangle is 180°

So,

x + 44° + 53° = 180°

x + 97° = 180°

x = 180° - 97°

x = 83°

Answer:

x+44+53=180

Step-by-step explanation:

x+44+53=180

44+53=97

180-97=83

The Center for Education Reform is an organization founded in 1993 to help foster better
education opportunities in American communities. It spends 4 cents out of every dollar
in its spending budget for administrative expenses. In 2004, the center's spending
budget was approximately 2.8 million dollars. Use a proportion to estimate the
administrative expenses for 2004.

The Center for Education Reform is an organization founded in 1993 to help foster bettereducation opportunities

Answers

Chicken fingers will be the answer, hoped this helped.

1. A circle is shown. 12 cm What is the diameter of the circle in centimeters? What is the radius of the circle in centimeters?

Answers

Answer: B: 113.04cm^2

Step-by-step explanation:

Write the formula for
the function whose
parabola is narrow,
opens downward, has a
y-intercept of (0,-3.14),
and has NO x-intercepts.

Answers

Answer:

Equation of the  parabola    x² = -12.56 y

Step-by-step explanation:

Explanation:-

Given Y- intercept ( 0, -3.14)

Given Focus is ( 0 , -a) = ( 0, -3.14)

So  a = 3.14 center C(0,0)

The graph of the parabola is downwards and the axis of the parabola is Y-axis.

Equation of the standard parabola    x² = -4 a y

                                                              x² = -4 (3.14) y

                                                              x² = -  12.56 y

Conclusion:-

Equation of the  parabola    x² = -12.56 y

What are the next three terms of the geometric sequence 32, -16, 8, …?
a.
2, 1, 1/2
c.
-8, 16, -32
b.
4, 2, 1
d.
-4, 2, -1

What are the next three terms of the geometric sequence 32, -16, 8, ? a.2, 1, 1/2c.-8, 16, -32b.4, 2,

Answers

Answer:

B is your answeer

Step-by-step explanation:

GL hope i helped<333!!

the _____ of a trapezoid is a segment whose endpoints are the midpoints of its legs.

Answers

Answer:

The segment that connects the midpoints of the legs of a trapezoid is called the median of the trapezoid.

Step-by-step explanation:

The binomial I + 7 is a factor of polynomial p.
а
Use this information to complete the equation.

Answers

Answer:

Where is the rest of the question

Step-by-step explanation:

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