Suppose you are the manager of Speedy Oil Change which claims that it will change the oil in​ customers’ cars in less than 30 minutes on average. Further suppose that several complaints have been filed from customers stating that their oil change took longer than 30 minutes. ​ Upper-level management at Speedy Oil Change headquarters has requested that you investigate the complaints. To begin your​ investigation, you randomly audit 36 oil changes performed by Speedy Oil Change and record the time each customer waited for the oil change. The number of minutes to complete each of the 36 oil changes is reported below.
Suppose you are the manager of Speedy Oil Change which claims that it will change the oil in​ customers’ cars in less than 30 minutes on average. Further suppose that several complaints have been filed from customers stating that their oil change took longer than 30 minutes. ​ Upper-level management at Speedy Oil Change headquarters has requested that you investigate the complaints. To begin your​ investigation, you randomly audit 36 oil changes performed by Speedy Oil Change and record the time each customer waited for the oil change. The number of minutes to complete each of the 36 oil changes is reported below.
42
29
19
11
10
27
41
27
22
26
28
32
17
15
25
35
32
22
13
31
17
30
33
25
18
24
28
21
40
19
34

30
14
23
22
10
1. Write the null and alternative hypothesis. Label each accordingly.
2. Calculate the Test Statistic and the​ P-value. Label each​ accordingly, and report the​ P-value to 4 decimal places.
3. Using the​ P-value calculated in​ #2, explain why you would or would not reject the null​ hypothesis? Answer using a complete​ sentence, proper grammar and correct spelling. Do NOT write a conclusion.
4. Based on your answer to​ #3, write a final conclusion for the test of​ hypotheses, and explain if the company is fulfilling its promise to​ “change the oil in​ customers’ cars in less than 30 minutes on​ average?” Answer using a complete​ sentence, proper grammar and correct spelling.

Answers

Answer 1

The null hypothesis is that the average time to change the oil in customers' cars is 30 minutes or less. The alternative hypothesis is that the average time to change the oil in customers' cars is more than 30 minutes

How to explain the hypothesis

The p-value is the probability of obtaining a t-value as extreme or more extreme than the observed value, assuming the null hypothesis is true. Using a t-distribution table or a statistical software, we can calculate the p-value as 0.0081

The test statistic as:

= 24.58, s = 8.40, n = 36

t = (24.58 - 30) / (8.40 / ✓(36))

= -2.76

Since the p-value (0.0081) is less than the significance level (0.05), we can reject the null hypothesis.

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Related Questions

Consider a normal distribution with mean 17 and standard deviation 4.

a) Find the z-score for x=22.

b) How many standard deviations from the mean is x=22?

Answers

Answer:

a) 1.25

b) 1.25

Explanation:

a) z-score for x=22:

(22-17)/4 = 1.25

b) 1.25, that's exactly what z-score means

What were the two new attitudes of Americans, regarding Native American music towards the turn of
the century?

Answers

Answer:

I'm not quite sure what specific turn of the century you are referring to. However, if you're asking about the turn of the 19th century, then one of the new attitudes towards Native American music was appreciation, as some Americans developed an interest in the music of Native American cultures. The other was appropriation, as some Americans sought to use Native American music for their own purposes, rather than respecting its cultural significance.

Explanation:

PLEASE HELP THIS WAS DUE ON 03/16/2023 THIS IS A CONSTRUCTED RESPONSE
In the past, your school allowed two free tardies to each class before a detention was assigned, now students only have one free tardy before they are assigned detention.

You have been assigned to write a letter to the principal of your school protesting the new "Only One Free Tardy per Class" policy.


In your letter, please list at least three reasons that you think that the "Only One Tardy" policy needs to be changed. Address your letter to Dr. Smithsonian.

Answers

Answer:

Dear Dr. Smithsonian,

I am writing to express my concerns regarding the new policy of allowing only one free tardy per class. I believe that this policy is unfair and should be changed for several reasons.

Firstly, students may sometimes be late due to factors that are beyond their control, such as traffic or public transportation delays. It is not fair to punish students for circumstances that are beyond their control, especially if they have a good attendance record and are not habitual latecomers.

Secondly, the new policy puts undue pressure on students, particularly those who live far from school or have other responsibilities outside of school hours. Students who have to juggle family responsibilities, work, or other commitments may find it difficult to be on time for every class, and punishing them for being late is not an effective way to encourage good attendance.

Finally, the new policy does not take into account the fact that students may sometimes need extra time to complete assignments or prepare for exams. If a student is working on an important project or studying for a test, they may need to stay up late and may oversleep or be a few minutes late for class. Punishing them for being late in such circumstances is not conducive to a positive learning environment.

For these reasons, I respectfully request that the school administration reconsiders its policy on tardiness and reverts to the previous system of allowing two free tardies per class before assigning detention. This would be a fairer and more reasonable approach that takes into account the challenges that students may face in their daily lives.

Thank you for your consideration.

Sincerely,

[Your Name]

Explanation:

PLEASE HELP THIS WAS DUE ON 03/16/2023 THIS IS A CONSTRUCTED RESPONSE
In the past, your school allowed two free tardies to each class before a detention was assigned, now students only have one free tardy before they are assigned detention.

You have been assigned to write a letter to the principal of your school protesting the new "Only One Free Tardy per Class" policy.


In your letter, please list at least three reasons that you think that the "Only One Tardy" policy needs to be changed. Address your letter to Dr. Smithsonian.

Answers

Answer:

Explanation:

Dear Dr. Smithsonian,

I am writing to express my concern and protest regarding the new "Only One Free Tardy per Class" policy. As a student of this school, I believe that this policy is unfair and should be changed for the following reasons:

Punishing students for being late to class is not an effective way to promote punctuality. While it is important to encourage students to arrive on time, punishing them for tardiness is not a productive solution. Instead, the school should consider alternative methods of encouraging punctuality, such as incentivizing students who arrive on time or addressing underlying issues that may be causing students to be consistently late.

The "Only One Free Tardy" policy does not take into account extenuating circumstances that may cause a student to be late. There are many situations that are beyond a student's control, such as traffic or a family emergency, that could cause them to be late to class. Punishing these students for circumstances that are beyond their control is unfair and does not promote a positive learning environment.

The policy creates unnecessary stress and anxiety for students. The fear of being punished for being late can cause students to feel anxious and stressed, which can ultimately have a negative impact on their academic performance. By removing this policy, the school can create a more relaxed and positive learning environment that will allow students to focus on their studies and succeed academically.

In conclusion, I strongly believe that the "Only One Free Tardy per Class" policy is unfair and should be changed. As a school, we should be focusing on creating a positive and supportive learning environment that encourages academic success, rather than punishing students for being late. Thank you for your attention to this matter.

Sincerely,

{YOUR NAME}

8 1.......... a successful author one day. A be C go to be B'm being D'm going to be​

Answers

The correct answer is D. "I'm going to be a successful author one day." This sentence is in the future tense, indicating that the speaker has a goal or aspiration to become a successful author in the future.

When discussing farm insurance, which of the following most accurately describes "scheduled property"? A. Excluded property B. Itemized property C. D. Blanket coverage Excluded coverage​

Answers

B. Itemized property

some hints for presenting the strongest possible responses in an interview are:
(a) don't rush your answers but give the facts
(b) keep it brief, be honest about gaps in work history
(c) present yourself in a calm and confident manner
(d) all of the above ​

Answers

Option (d) - all of the above - is correct.

(a) It is important to give complete answers and not rush through them, so that the interviewer can understand your perspective and assess your abilities better.

(b) Being honest about gaps in work history shows integrity and allows the interviewer to understand your work history more accurately. It is better to be concise and to the point while explaining gaps, rather than being vague or providing too much information.

(c) Presenting yourself in a calm and confident manner reflects well on your ability to handle stress and pressure in a professional environment. This can also help to create a positive impression on the interviewer.

factors involved in expertise include:
(a) talent
(b) aptitude
(c) practice & motivation
(d) all​

Answers

The factors involved in expertise include practice and motivation, as well as other factors such as talent and aptitude. Therefore, option (d) all of the above is the correct answer. While some people may have natural talent or aptitude for a particular skill or area of knowledge, sustained practice and motivation are essential for developing expertise in any field.

I need help ASAP! This is for a Social Work class, and I can't have no wrong answers to this. If the answers are incorrect or not pertain to this you won't be flagged as brainiest. It'll just get automatically deleted, Thanks! Also Please list your references/Work Cited.


Self-care and self-reflection. Please read the following blog and submit thoughts on top three points noted, as well as how you plan to implement self-care into your daily and professional life.


Topic #1: Returning to IRL (In Real Life) Practice is Tricky


Many of us will continue to engage in practice in a hybrid fashion – the door to Zoom rooms has been opened and isn’t going to close any time soon, if ever. Returning to in-person interactions and being with people reminds us of the value of engagement and the energy that’s generated when we are physically together.


Boundaries are influenced by this re-entry and re-creation of how we engage in our work. Paying attention to how we’re feeling, perceiving, and approaching ourselves, our colleagues, and our clients is critical to clear, professional, and flexible boundaries. It may require us to revisit the Code of Ethics and to re-establish our professional way of being in our practice.


Topic #2: Burnout is (still) a Reality


The degree and intensity of burnout for many social workers runs along a broad spectrum. Pre-pandemic, our profession was all too familiar with the reality of burnout; some may say we ‘coined the term.’ When we experience the nagging, exhausted, spark-less feelings about our work, it is imperative that we consider the impact not only on ourselves, but our clients, communities, and our profession.


Self-reflection about how we are engaging in the work will influence our decisions about boundary expression. If we’re feeling out of balance, is it related to the ways our work lives have changed and blurred even further with our personal lives? Perhaps creating limits and space between work and home is a place to re-start.


Topic #3: Self-Care Requires Intentional Boundary Setting


Now an official, ethical value in our profession, self-care remains as relevant as it always has been and a practice that if approached intentionally, will benefit how our boundaries are implemented in our work and personal lives.


Disclaimer: The National Association of Social Workers invites members to share their expertise and experiences through Member Voices. This blog was prepared by Sarah Meisinger, MSW, LICSW in her personal capacity and does not necessarily reflect the view of the National Association of Social Workers.


Sarah Meisinger MSW, LICSW is Director of Field Education for the Department of Social Work at St. Cloud State University in Minnesota. She is the author of the book Exploring Boundaries in Social Work Practice: The Space In Between, (Cognella Academic Publishing; May, 2021).

Answers

Answer:

1. The challenges of returning to in-person practice and the importance of paying attention to how we're feeling and approaching ourselves, colleagues, and clients.

2. The reality of burnout in the social work profession and the importance of self-reflection to address it.

3. The significance of intentional boundary setting for effective self-care, both personally and professionally.

Explanation:

To implement self-care in daily and professional life, it is essential to prioritize intentional boundary setting. This can involve creating a clear separation between work and personal life by establishing limits and space. It is also important to engage in regular self-reflection to ensure that we are not experiencing burnout or feeling out of balance in our work. Additionally, staying connected to colleagues, friends, and family can be helpful in maintaining a support system and addressing any concerns that arise. Lastly, it is essential to engage in activities that promote relaxation, such as meditation, yoga, exercise, or creative hobbies. By implementing these strategies, individuals can create a healthy work-life balance and reduce the risk of burnout while also promoting overall well-being.

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