refer to the accompanying data set of mean​ drive-through service times at dinner in seconds at two fast food restaurants. construct a ​% confidence interval estimate of the mean​ drive-through service time for restaurant x at​ dinner; then do the same for restaurant y. compare the results.

Answers

Answer 1

Step-by-step explanation:

Assuming the data is as shown, restaurant X has a mean service time of 180.56, with a standard deviation of 62.6.

The standard error is SE = s/√n = 62.6/√50 = 8.85.

At 95% confidence, the critical value is z = 1.960.

Therefore, the confidence interval is:

180.56 ± 1.960 × 8.85

180.56 ± 17.35

(163, 198)

Restaurant Y has a mean service time of 152.96, with a standard deviation of 49.2.

The standard error is SE = s/√n = 49.2/√50 = 6.96.

At 95% confidence, the critical value is z = 1.960.

Therefore, the confidence interval is:

152.96 ± 1.960 × 6.96

152.96 ± 13.64

(139, 167)


Related Questions

what is most likely the author’s reason for praising secretary john sherman?

Answers

Praise is simply known as expressing one's respect, gratitude or appreciation to what another person has done for you. The author's praise of Secretary John Sherman is because she wants To show readers that John Sherman is an ally, not an enemy, despite his objections to Cuba's acquisition and war with Spain.

John Sherman was known to be a popular politician from the U.S. State. He existed during the American Civil War and into the late nineteenth century. He was a member of the Republican Party, and was U.S. Congress.

The author praises Secretary Sherman due to the part he had played as the Secretary of State during the Presidency of President William McKinley in 1897. The secretary was known to play a key role in smoothing relationships with China.

Conclusively, Secretary John Sherman was known for his well-meaning opposition to some of the foreign policies that existed then as Secretary of the Treasury and Secretary of State.

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an electric ceiling fan with blades 0.750 m in diameter is rotating about a fixed axis with an initial angular velocity of 1.57 rad/s. the angular acceleration is 5.65 rad/s².

Answers

The final angular velocity of the fan at the given time is 2.66 rad/s.

"Your question is not complete, it seems to be missing the following information";

Compute the fan's angular velocity magnitude after time 0.192 s has passed.

The given parameters;

diameter of the blade, d = 0.75 minitial angular velocity of the blade, ω₀ = 1.57 rad/sangular acceleration of the blade, α = 5.65 rad/s²

The final angular velocity of the fan at the given time is calculated by applying the second kinematic equation;

[tex]\omega_ f = \omega _0 + \alpha t\\\\\omega _f = (1.57) + (0.192\times 5.65)\\\\\omega _f = 2.66 \ rad/s[/tex]

Thus, the final angular velocity of the fan at the given time is 2.66 rad/s.

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An increase in childlessness is a recent trend in American family life. Please select the best answer from the choices provided T F

Answers

Answer:

True

Explanation:

Answer: True

Explanation:

what is the energy conversion during cellular respiration?

Answers

it’s called ATP

ATP basically means energy

Angelique makes beaded jewelry. The graph below shows the number of beads on varying cord lengths. Jewelry A graph has cord length (inches) on the x-axis and number of beads on the y-axis. A line has a regression equation of y = 2.52 x 1.61. A necklace contains 88 beads. Based on the information above, which is the best estimate for the cord length? 21 inches 26 inches 34 inches 36 inches

Answers

Answer:

c. 34

Explanation:

I just did the test and got it right

Answer:

The answer is c. 34 hope this helps...

Explanation:

A writer should use a(n) pronoun to show ownership.

Answers

Answer:   Possessive.

Explanation: A writer should use a(n) { Possessive }  pronoun to show ownership.

A writer should use a possessive pronoun to show ownership.

What is a pronoun?

A pronoun is one of the parts of speech in English language and it can be defined as a word that is used to replace a noun in a sentence.

The types of pronoun.

In English language, there are seven types of pronouns and these include:

Personal pronounsRelative pronounsReflexive pronounsIndefinite pronounsDemonstrative pronounsInterrogative pronounsIntensive pronounsPossessive pronouns

Generally, a writer should use a possessive pronoun to show ownership such as mine, ours, yours, etc.

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how long will it take the satellite with mass 1500 kg

Answers

Answer:

1.51 Seconds is the answer

Study the image. Which statement best describes the rock? The rock has fine grains. The grains of the rock are sharp or jagged. The rock is banded. The bands of the rock run from the top to the bottom.

Answers

Fine grain are refered to as rocks or grains that has low graininess so that some have enlargement without undue coarseness present. The statement that best describes the rock is that the rock has fine grains.

A rock is commonly referred to as any naturally solid mass, aggregate of minerals or mineraloid matter.

Rocks does have chemical composition and are usually grouped into three main groups: igneous rocks, metamorphic rocks and sedimentary rocks

Conclusively, The fine-grained texture shows that the fast cooling lava did not have time to grow large crystals.

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Answer:

A

Explanation:

edge

Which date formats are allowed by default in Excel for February 14, 2018? Select four answers. 14-Feb-18 14-Feb 2018, February 14 2/014/2018 02/14/18 2/14/2018

Answers

1. 14-Feb-18

2. 14-Feb

5. 2/14/18

6. 2/14/2018

Edge2020!

Answer:

1

2

5

6

Explanation: i just did it

a 15.0 kg block is attached to a very light horizontal spring of force constant 575 n/m and is resting on a smooth horizontal table (figure 1). suddenly it is struck by a 3.00 kg stone traveling horizontally at 8.00 m/s to the right, whereupon the stone rebounds at 2.00 m/s horizontally to the left.

Answers

The instantaneous velocity of the 15 kg. mass just after collision can be found by the principle of linear momentum.

a) The speed of the 15 kg. just after collision is 2 m/s.

b) The type of collision is inelastic collision

c) The compression of the spring is approximately 0.323 m.

Reasons:

The given parameters are;

Mass of the block attached to the spring, m₁ = 15.0 kg

Force constant of the spring, K = 575 N/m

Mass of the stone that strikes the block, m₂ = 3.00 kg

Speed of the stone, v₂ = 8.00 m/s

Speed with which the stone rebounds, v₃ = 2.00 m/s

a) The total initial momentum = 3 kg. × 8 m/s = 24 kg·m/s

The final momentum, just after collision = 3 × (-2) kg·m/s + 15 kg ×v₁

By conservation of momentum, we have;

24 kg·m/s = 3 × (-2) kg·m/s + 15 kg ×v₁

[tex]v_1 = \dfrac{24 \, kg \cdot m/s + 6 \, kg \cdot m/s}{15 \, kg} = 2 \, m/s[/tex]

The speed of the 15 kg. just after collision, v₁ = 2 m/s.

b) A collision is elastic when the kinetic energy of the collision is conserved

The initial kinetic energy, K.E.₁ = 0.5 × 3 kg. ×(8 m/s)² = 96 J

The sum of the final kinetic energy are;

0.5 × 3 kg. ×  (2 m/s)² + 0.5 × 15 kg ×  (2 m/s)² = 36 J

The initial kinetic energy ≠  The final kinetic energy

Therefore, the collision is not elastic

(c) The kinetic energy given by the block = The elastic potential energy gained by the spring

Kinetic energy of the block, K.E. = 0.5 × 15 kg ×  (2 m/s)² = 30 J

Elastic energy gained by the block = 0.5 × K × x² = 0.5 × 575 N/m × x²

Therefore;

0.5 × 575 N/m × x² = 30 J

[tex]x^2 = \dfrac{30 \, J}{0.5 \times 575 \, N/m} = \dfrac{12}{115} \, m^2[/tex]

[tex]x = 2 \cdot \sqrt{\dfrac{3}{115} } \approx 0.323[/tex]

The compression of the spring, x ≈ 0.323 m.

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Questions;

(a) The speed of the 15 kg mass immediately after the collision.

(b) Determine the type of collision; Elastic or inelastic collision.

(c) The distance to which the spring is compressed by the block.

which type of front usually brings thunderclouds and storms?

Answers

Answer:

usually cold fronts

Explanation:

Answer:

Cold front forms Thunderclouds and storms.

Explanation:

all prokaryotic and eukaryotic cells have all of the following except

Answers

Answer:

prokaryotic cells dont have nucleus

what is the edge length of a simple cubic unit cell made up of atoms having a radius of 158 pm?

Answers

Answer:

The edge length of a BCC unit cell is 352 pm

Explanation:

       When all angles are exactly 90 degrees, all lengths are identical, and each axis is designated by a Cartesian coordinate, the cubic unit cell is the smallest repeating unit (x,y,z). Eight atoms are located at each corner of each cubic cell, and eight other cells share each atom.

Is the fcc a cubic cell?

         Atoms are found at the corners and centers of every cube face in FCC, which is also a cubic structure. Four atoms make up an FCC unit cell, with each corner atom representing a 1/8 atom and each face center atom representing a 1/2 atom. FCC crystals have an APF of 0.74.

         Ferrite is the name of the alpha phase. Steels frequently contain the mineral ferrite, which has a Body Centred Cubic (BCC) structure that is less tightly packed than FCC.

        For instance, the cubic crystal structure is made up of three different types of unit cells: plain cubic, face-centered cubic, and body-centered cubic.

        The following is the formula for calculating edge length:

a = √8 × r  where r = radius and a = edge length

Given:   r = 158 pm

changing the values in the formula above.

a = √8 × 175  = 352 pm

Therefore, the edge length will be 352 pm.

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Find the value of x and y, given the following matrix equation: matrix x = y =

Answers

Based on the given matrix equation, the value of x and y are ±6 and 16 respectively.

How to determine the value of x and y.

In order to solve for the value of x and y, we would create an equation from the upper and lower part of this matrix respectively.

x² - 4 = 32   ...........(upper part)

y + y - 4 = y + 6  ....(lower part)

Next, we would solve for x:

x² - 4 = 32

x² = 32 + 4

x² = 36

x = ±√36

x = ±6.

For the value of y, we have:

y + y - 4 = y + 6

2y - 4 = y + 6

2y - y = 6 + 10

y = 16.

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 Answer: 6, -6

                  10

Explanation:

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which equation could be solved using the graph above

Answers

There’s no graph shown

write an algebraic expression for three times a number plus 16

Answers

Answer:

y = "a number"

3 x y + 16

Explanation:

Read the excerpt from chapter 8 of The Travels of Marco Polo. Dhofar is a fine city of great size and splendor lying about 500 miles north-west of Shihr. Here again the people are Saracens and worship Mahomet, and are subject to a count who is likewise subject to the sultan of Aden. You must understand that this city is still within the province of Aden. The city stands on the sea and has a very good port, frequented by many merchant ships that import and export great quantities of merchandise. Many good Arab steeds, and horses from other lands as well, are brought here, and the merchants make a handsome profit on them. The city has many other cities and towns under its sway. Here again good incense grows in profusion - I will tell you how. Which statement about Dhofar shows an objective perspective? "The people are Saracens and worship Mahomet." "The city stands on the sea and has a very good port." "Dhofar is a fine city of great size and splendor." "Here good incense grows in profusion."

Answers

Answer:

A

Explanation:

The people are Saracens and  worship Mahomet

Took the Test

I tried B and it was wrong, it is A

The statement about Dhofar that shows an objective perspective is: “The people are Saracens and worship Mahomet.”

What is an objective perspective?

An objective perspective has one that has state the fact without inserting the personal views as well as feelings. The first option has an example of an objective perspective. One can see there that the writer has stated a fact about the Dhofar people.

He actually did not talk about his like or the dislike for them and the neither were other personal views that included in the statement. According to the stanza many good Arab steeds, and horses from other lands as well, are brought here, and the merchants make a handsome profit on them.

Therefore, The statement which tells about Dhofar that shows an objective perspective is: “The people are Saracens and worship Mahomet.”

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The question seems to be incomplete, the complete part of the question will be:

Read the excerpt from chapter 8 of The Travels of Marco Polo.

Dhofar is a fine city of great size and splendor lying about 500 miles north-west of Shihr. Here again the people are Saracens and worship Mahomet, and are subject to a count who is likewise subject to the sultan of Aden. You must understand that this city is still within the province of Aden. The city stands on the sea and has a very good port, frequented by many merchant ships that import and export great quantities of merchandise. Many good Arab steeds, and horses from other lands as well, are brought here, and the merchants make a handsome profit on them. The city has many other cities and towns under its sway. Here again good incense grows in profusion - I will tell you how.

Which statement about Dhofar shows an objective perspective?

“The people are Saracens and worship Mahomet.”

“The city stands on the sea and has a very good port.”

“Dhofar is a fine city of great size and splendor.”

“Here good incense grows in profusion.”

are all news and information in the internet true why or why not

Answers

Answer:

no because it maybe bias

What does the underlined word mean in the following sentence? A mi amigo le gusta cantar. to dance to sing to sunbathe to relax

Answers

Answer:

To sing.

Explanation:

A mi amigo le gusta cantar is Spanish for: My friend likes to sing. Therefore, I am assuming the underlined word would have been cantar, which means to sing. As sing is one of your options, one would assume that the proper answer would be sing.

Hope this helps, and I apologize if this is inaccurate as there was no word that was underlined in this question.

Have a great day! :D

Answer:

B. To sing

Explanation:

¡Buena suerte! <3

what are some reasons dns is necessary? check all that apply.

Answers

DNA contains the instructions needed for an organism to develop, survive and reproduce. To carry out these functions, DNA sequences must be converted into messages that can be used to produce proteins, which are the complex molecules that do most of the work in our bodies.

what is the area in square meters of 6 triangles draw a diagram

Answers

The answer is:
I’m the left

Read the second stanza of "Some Keep the Sabbath Going to Church." Some keep the Sabbath in Surplice – I just wear my Wings – And instead of tolling the Bell, for Church, Our little Sexton – sings. What is the effect of the word "surplice," which is a garment worn by the clergy, in this stanza? It reinforces the difference between the natural things the speaker holds dear and the rituals of the church. It reinforces the poet’s belief that most people feel the need to attend church. It reinforces the poet’s authority by suggesting that she knows quite a bit about religious rituals. It reinforces the speaker’s view that great mystery lies at the heart of most religious rituals.

Answers

The effect of the word "surplice," which is a garment worn by the clergy, in this stanza is:

A. It reinforces the difference between the natural things the speaker holds dear and the rituals of the church

According to the given question, we can see that the author talks about the religious rituals which occurs when people go to church and put on clergy garments when in church.

As a result of this. we can see that the effect of this word in the stanza is that it shows the difference between the natural things and the spiritual rituals of the church.

This is because, the narrator further shows the bells, the little Sexton and the Surplices which are all used in the church and how she spends her Sabbath at home with her wings.

Therefore, the correct answer is option A

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Answer:

A

Explanation:

how did the balance of power between spain and the united states

Answers

Answer:

Spanish influence in the Western Hemisphere declined.

U.S. influence in the Eastern Hemisphere increased.

Explanation:

Who said that the world is divided into two classes, the hunters and the huntees? Question 1 options: Zaroff Ivan Rainsford Whitney

Answers

The person is Rainsford :)

closing entries may be prepared from all of the following except

Answers

Answer:

what is the question

Explanation:

What happened as a result of the Boxer Rebellion? Foreign powers were driven out of China. The US became the dominant country in China. The Boxers seized control of China’s government. Chinese resistance to foreign power was forced to end.

Answers

Answer:

D

Explanation:

on Edge 2021

The incident that happened as a result of the Boxer Rebellion is that the Chinese resistance to a foreign power was forced to end. Thus, the correct option for this question is D.

What do you mean by the Boxer rebellion?

The Boxer rebellion may be characterized as an insurgence of a particular community against foreigners. This movement happened in China in 1900 and was initiated by peasants but eventually bolster by the government. It is also known as the Boxer Uprising.

According to the context of this question, a Chinese confidential community particularly referred to as the Boxers undertook a violent movement in order to drive all foreigners from China. In response to them, numerous countries sent armed forces to cessation the attacks.

Therefore, the Chinese resistance to a foreign power was forced to end the incident that happened as a result of the Boxer Rebellion. Thus, the correct option for this question is D.

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a manager is going to purchase new processing equipment and must decide on the number of spare parts to order with the new equipment. the spares cost $200 each, and any unused spares will have an expected salvage value of $50 each. the probability of usage can be described by the following distribution: number 0 1 2 3 probability .1 .5 .25 .15 if a part fails and a spare is not available, two days will be needed to obtain a replacement and install it. the cost for idle equipment is $500 per day. what quantity of spares should be ordered and what is the corresponding expected cost?

Answers

Answer:

It will  cost  the manager $750

Explanation:

Complete the following statements. Paragraphs 1 and 2 . The paragraph sounds more like casual conversation.

Answers

1. A. make the same basic argument

2. B. second

3. 1, 3, 4,

Answer: Guy is right

Explanation:

edge 2022

what was the purpose of the missouri compromise brainly

Answers

The purpose of the Missouri Compromise was to keep a balance between the number of slave states and the number of free states in the Union. It allowed Missouri to enter as a slave state at the same time Maine entered as a free state, thus maintaining a balance in numbers of free and slave states.

Based on the chemical equation provided, use the drop-down menu to choose the coefficients that will balance the chemical equation. ( )H2 ( )O2 → ( )H2O

Answers

On the left side, you have 2 atoms of oxygen, so you need at least 2 molecules of water on the right. Then you would end up with 4 total atoms of hydrogen on the right, so you need to have 2 hydrogen molecules on the left to balance the reaction:

2 H₂ + O₂   ⇄   2 H₂O

Answer:

221

Explanation:

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