In: Math
The data below represents the weight loss (in pounds) for people on three different exercise programs. At the 0.01 significance level, does it appear that a difference exists in the true mean weight loss produced by the three exercise programs.
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Exercise A |
Exercise B |
Exercise C |
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7.1 |
3.1 |
6.7 |
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8.0 |
2.2 |
8.1 |
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7.5 |
5.0 |
5.0 |
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6.8 |
4.4 |
9.0 |
a) State the null and alternative hypotheses.
b) Find the P-value. STATE THE CALCULATOR COMMAND YOU USE.
c) State whether you should reject or fail to reject the null hypothesis. Justify your answer.
d) State your conclusion in non-technical terms. Which exercise program appears to be the least effective based on the sample data?
In: Statistics and Probability
As we are preparing to use the Figures of Merit to evaluate our team capital investment projects, please discuss the following:
In: Finance
Reflect on a time from your childhood when direct definitions, identity scripts, or attachment styles left a big impact on your self-identity. How did the experience shape your perception of who you were at the time? Have those same self-perceptions become a major part of how you think about yourself now or have other experiences reshaped your identity to its current state? How does social comparison theory play out in your professional and personal life? Which type of comparison do you find yourself making most often (similarity/difference, upward, downward)? What impact does social media have on social comparison?
In: Operations Management
2. Fall temperatures in San Diego (measured on the Celsius Scale ℃) result in summary statistics:
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n=30 |
x = 22.30 ℃ |
s = 1.38 ℃ |
Use a 0.01 significance level to test the claim that the mean summer temperature in San Diego is less than 25.8 ℃. Use the critical value method for testing the claim. Assume temperatures are approximately normally distributed.
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a. Fill in the table completely with justification. Solution: |
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H0: |
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H1: |
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State whether the test is two-tailed, left-tailed or right-tailed and justify. |
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The value of α = |
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Write the formula for the appropriate test statistic and justify: |
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The value of the P-value= |
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Critical value(s) = |
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b. State the conclusion that addresses the original claim. Solution: |
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c. Assume the population standard deviation σ is known to be 1.55 ℃. Identify the test statistic. Use the P-value method to conduct the hypothesis test. Does your conclusion agree with your result in (b)? Solution: |
3. A Verizon survey of 400 smartphone users showed that 210 of them said that their smartphone is the only thing they could not live without. Use a 0.05 level of significance to test the claim that more than half of smartphone users identify the smartphone as the only thing they could not live without.
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a. State: H0 and H1, the test statistic, p-value and critical value(s). Solution: |
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H0: |
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H1: |
|
State whether the test is two-tailed, left-tailed or right-tailed. |
|
The value of α = |
|
Write the formula for the appropriate test statistic: |
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The value of the P-value= |
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Critical value(s) = |
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b. State the conclusion that addresses the original claim. Solution: |
In: Statistics and Probability
In: Anatomy and Physiology
Exercise 10-45 (LO10-6)
The number of "destination weddings" has skyrocketed in recent years. For example, many couples are opting to have their weddings in the Caribbean. A Caribbean vacation resort recently advertised in Bride Magazine that the cost of a Caribbean wedding was less than $30,000. Listed below is a total cost in $000 for a sample of 8 Caribbean weddings. At the 0.05 significance level, is it reasonable to conclude the mean wedding cost is less than $30,000 as advertised?
| 31.7 | 30.5 | 31.4 | 28.6 | 29.2 | 29.4 | 29.6 | 28.5 |
Exercise 10-45 (LO10-6)
The number of "destination weddings" has skyrocketed in recent years. For example, many couples are opting to have their weddings in the Caribbean. A Caribbean vacation resort recently advertised in Bride Magazine that the cost of a Caribbean wedding was less than $30,000. Listed below is a total cost in $000 for a sample of 8 Caribbean weddings. At the 0.05 significance level, is it reasonable to conclude the mean wedding cost is less than $30,000 as advertised?
| 31.7 | 30.5 | 31.4 | 28.6 | 29.2 | 29.4 | 29.6 | 28.5 |
In: Statistics and Probability
-Identify and discuss factors contributing to the nursing shortage in your community, your state and nationally.
-Identify and present strategies for recruitment and retention of high quality nursing professionals.
-What are the leadership and management implications for staff turnover?
In: Nursing
1. When thinking about patch management, in your own words discuss the issues with patch management and how virtualization might assist with some of these issues.
2. A security policy is a document that states how the organisation plans to protect the organisations information Technology assets. In your own words, state how a security policy affects the organisation's culture and the two things the policy must balance.
In: Computer Science
Case study: Facilities Scheduling at Mayer Manufacturing
Eddie Turner was elated with the good news that he was being promoted to section supervisor in charge of scheduling all activities in the new engineering research laboratory. The new laboratory was a necessity for Mayer Manufacturing. The engineering, manufacturing, and quality control directorates were all in desperate need of a new testing facility. Upper-level management felt that this new facility would alleviate many of the problems that previously existed. The new organizational structure (as shown in Exhibit I) required a change in policy over use of the laboratory. The new section supervisor, on approval from his department manager, would have full authority for establishing priorities for the use of the new facility. The new policy change was a necessity because upperlevel management felt that there would be inevitable conflict between manufacturing, engineering, and quality control. After one month of operations, Eddie Turner was finding his job impossible, so Eddie has a meeting with Gary Whitehead, his department manager. Eddie: “I’m having a hell of a time trying to satisfy all of the department managers. If I give engineering prime-time use of the facility, then quality control and manufacturing say that I’m playing favorites. Imagine that! Even my own people say that I’m playing favorites with other directorates. I just can’t satisfy everyone.” Facilities Scheduling at Mayer Manufacturing 475 1321.ch12 11/3/05 9:27 AM Page 475 Gary: “Well, Eddie, you know that this problem comes with the job. You’ll get the job done.” Eddie: “The problem is that I’m a section supervisor and have to work with department managers. These department managers look down on me like I’m their servant. If I were a department manager, then they’d show me some respect. What I’m really trying to say is that I would like you to send out the weekly memos to these department managers telling them of the new priorities. They wouldn’t argue with you like they do with me. I can supply you with all the necessary information. All you’ll have to do is to sign your name.” Gary: “Determining the priorities and scheduling the facilities is your job, not mine. This is a new position and I want you to handle it. I know you can because I selected you. I do not intend to interfere.” During the next two weeks, the conflicts got progressively worse. Eddie felt that he was unable to cope with the situation by himself. The department managers did not respect the authority delegated to him by his superiors. For the next two weeks, Eddie sent memos to Gary in the early part of the week asking whether Gary agreed with the priority list. There was no response to the two memos. Eddie then met with Gary to discuss the deteriorating situation. Eddie: “Gary, I’ve sent you two memos to see if I’m doing anything wrong in establishing the weekly priorities and schedules. Did you get my memos?” Gary: “Yes, I received your memos. But as I told you before, I have enough problems to worry about without doing your job for you. If you can’t handle the work, let me know and I’ll find someone who can.” Eddie returned to his desk and contemplated his situation. Finally, he made a decision. Next week he was going to put a signature block under his for Gary to sign, with carbon copies for all division managers. “Now, let’s see what happens,” remarked Eddie.
1. What is the executive summary and the conclusion of this case?
2. What was the decision of Eddie at the end of the case?
In: Economics