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statistics problems-please show work | Mathematics homework help

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·         11.60 Suppose that in Example 11.1 we wanted to determine whether there was sufficient evidence to conclude that the new system would not be costeffective. Set up the null and alternative hypotheses and discuss the consequences of Type I and Type II errors. Conduct the test. Is your conclusion the same as the one reached in Example 11.1? Explain.

·         EXAMPLE 11.1 Department Store’s New Billing System

·        

·         The manager of a department store is thinking about establishing a new billing system for the store’s credit customers. After a thorough financial analysis, she determines that the new system will be cost-effective only if the mean monthly account is more than $170. A random sample of 400 monthly accounts is drawn, for which the sample mean is $178. The manager knows that the accounts are approximately normally distributed with a standard deviation of $65. Can the manager conclude from this that the new system will be cost-effective?

·         SOLUTION:

·         IDENTIFY

·         This example deals with the population of the credit accounts at the store. To conclude that the system will be cost-effective requires the manager to show that the mean account for all customers is greater than $170. Consequently, we set up the alternative hypothesis to express this circumstance:

·            H1: μ > 170 (Install new system)

·         If the mean is less than or equal to 170, then the system will not be cost-effective. The null hypothesis can be expressed as

·            H0: μ ≤ 170 (Do not install new system)

·         However, as was discussed in Section 11-1, we will actually test μ = 170, which is how we specify the null hypothesis:

·            H0: μ = 170

·            As we previously pointed out, the test statistic is the best estimator of the parameter. In Chapter 10, we used the sample mean to estimate the population mean. To conduct this test, we ask and answer the following question: Is a sample mean of 178 sufficiently greater than 170 to allow us to confidently infer that the population mean is greater than 170?

·            There are two approaches to answering this question. The first is called the rejection region method. It can be used in conjunction with the computer, but it is mandatory for those computing statistics manually. The second is the p-value approach, which in general can be employed only in conjunction with a computer and statistical software. We recommend, however, that users of statistical software be familiar with both approaches.

Exercise 12.73

·         12.73 Xr12-73 With gasoline prices increasing, drivers are more concerned with their cars’ gasoline consumption. For the past 5 years a driver has tracked the gas mileage of his car and found that the variance from fill-up to fill-up was σ2 = 23 mpg2. Now that his car is 5 years old, he would like to know whether the variability of gas mileage has changed. He recorded the gas mileage from his last eight fill-ups; these are listed here. Conduct a test at a 10% significance level to infer whether the variability has changed.

 

Exercise 12.74

12.74 Xr12-74 During annual checkups physicians routinely send their patients to medical laboratories to have various tests performed. One such test determines the cholesterol level in patients’ blood. However, not all tests are conducted in the same way. To acquire more information, a man was sent to 10 laboratories and had his cholesterol level measured in each. The results are listed here. Estimate with 95% confidence the variance of these measurements.

188

193

186

184

190

195

187

190

192

196

 

 

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July 1, 2023
    

Primary Discussion Response is due by Wednesday (11:59:59pm Central), Peer Responses are due by Sunday (11:59:59pm Central).

Primary Task Response: Within the Discussion Board area, write 300–500 words that respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discussions by your classmates. Be substantive and clear, and use examples to reinforce your ideas.

Interest groups play a significant role in contemporary American politics, on a wide range of public policy issues, from healthcare (Affordable Care Act, for example) to gun control (the NRA is a well-known example), and from financial services regulation to regulating food production.

For this discussion board, choose an interest group that appeals to you and then identify a public policy issue that your selected interest group is working on impacting. In addition, include the following information:

  • What types of activities are conducted by your interest group? Provide examples of activities undertaken by the group within the last 12 months. Activities can include lobbying, television or radio spots, media spots, rallies or other activities. Also, if available, provide links to any news articles about the organization’s activities or press releases from the organization or other articles from the organization’s website for your classmates’ reference.
  • How is your chosen interest group connected to the average citizen, if at all? Provide examples of average citizens’ involvement in your chosen interest group, if any. If your chosen interest group rarely or does not interact with the average citizen, please discuss how the work of your chosen interest group indirectly impacts the average citizen, if at all.
  • Do you believe that interest groups do, or have the ability to, promote corruption in government? Explain your position. If they do or have the potential to do so, why do you believe so? If not, what do you think prevents them from corrupting government? Support your position with specific examples.

Responses to Other Students: Respond to at least 2 of your fellow classmates with a reply of at least 100 words about their primary task response. To help you with your discussion, please consider the following questions:

  • What did you learn from your classmate's posting?
  • What additional questions do you have after reading the posting?
  • What clarification do you need regarding the posting?
  • What differences or similarities do you see between your posting and other classmates' postings?

 

 

 

 

 

Individual project

 

Weekly tasks or assignments (Individual Projects) will be due by Monday and late submissions will be assigned a late penalty in accordance with the late penalty policy found in the syllabus. NOTE: All submission posting times are based on midnight Central Time.

PHASE 3 OUTLINE - THIS PROJECT MUST BE SUBMITTED IN OUTLINE FORM

After researching your topic and finding reliable sources, the next step is to use the information you have found to develop a working outline. In this assignment, you will build from your annotated bibliography. Using the same topic you researched in phase 2, you will plan and outline a Problem/Solution essay. You will use this outline to create a rough draft.

Before creating your first draft of the Problem/Solution essay, you will create a double-spaced outline that plans out your Problem/Solution essay in process.

The outline should begin with your Thesis Statement and introduce the Problem/Issue.

A well-integrated outline will include evidence of outside research integration, including specific statistics and data. Avoid using single word descriptions.  The stronger outline will be the more detailed and developed outline. 

Your Outline should contain the following:

  • A thesis statement
  • Topic sentences
  • Supporting information in the form of quotes or paraphrased passages
  • A properly formatted reference page with at least two reliable sources
  • Proper in text citations

In addition to these structural guidelines your individual project should also contain the following:

  • A cover page
  • Headers
  • Page numbers

Be double-spaced using 12 point, Times New Roman, Arial, or Courier fonts. Please submit your assignment.

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July 1, 2023
    

Primary Discussion Response is due by Wednesday (11:59:59pm Central), Peer Responses are due by Sunday (11:59:59pm Central).

Primary Task Response: Within the Discussion Board area, write 300–500 words that respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discussions by your classmates. Be substantive and clear, and use examples to reinforce your ideas.

Interest groups play a significant role in contemporary American politics, on a wide range of public policy issues, from healthcare (Affordable Care Act, for example) to gun control (the NRA is a well-known example), and from financial services regulation to regulating food production.

For this discussion board, choose an interest group that appeals to you and then identify a public policy issue that your selected interest group is working on impacting. In addition, include the following information:

  • What types of activities are conducted by your interest group? Provide examples of activities undertaken by the group within the last 12 months. Activities can include lobbying, television or radio spots, media spots, rallies or other activities. Also, if available, provide links to any news articles about the organization’s activities or press releases from the organization or other articles from the organization’s website for your classmates’ reference.
  • How is your chosen interest group connected to the average citizen, if at all? Provide examples of average citizens’ involvement in your chosen interest group, if any. If your chosen interest group rarely or does not interact with the average citizen, please discuss how the work of your chosen interest group indirectly impacts the average citizen, if at all.
  • Do you believe that interest groups do, or have the ability to, promote corruption in government? Explain your position. If they do or have the potential to do so, why do you believe so? If not, what do you think prevents them from corrupting government? Support your position with specific examples.

Responses to Other Students: Respond to at least 2 of your fellow classmates with a reply of at least 100 words about their primary task response. To help you with your discussion, please consider the following questions:

  • What did you learn from your classmate's posting?
  • What additional questions do you have after reading the posting?
  • What clarification do you need regarding the posting?
  • What differences or similarities do you see between your posting and other classmates' postings?

 

 

 

 

 

Individual project

 

Weekly tasks or assignments (Individual Projects) will be due by Monday and late submissions will be assigned a late penalty in accordance with the late penalty policy found in the syllabus. NOTE: All submission posting times are based on midnight Central Time.

PHASE 3 OUTLINE - THIS PROJECT MUST BE SUBMITTED IN OUTLINE FORM

After researching your topic and finding reliable sources, the next step is to use the information you have found to develop a working outline. In this assignment, you will build from your annotated bibliography. Using the same topic you researched in phase 2, you will plan and outline a Problem/Solution essay. You will use this outline to create a rough draft.

Before creating your first draft of the Problem/Solution essay, you will create a double-spaced outline that plans out your Problem/Solution essay in process.

The outline should begin with your Thesis Statement and introduce the Problem/Issue.

A well-integrated outline will include evidence of outside research integration, including specific statistics and data. Avoid using single word descriptions.  The stronger outline will be the more detailed and developed outline. 

Your Outline should contain the following:

  • A thesis statement
  • Topic sentences
  • Supporting information in the form of quotes or paraphrased passages
  • A properly formatted reference page with at least two reliable sources
  • Proper in text citations

In addition to these structural guidelines your individual project should also contain the following:

  • A cover page
  • Headers
  • Page numbers

Be double-spaced using 12 point, Times New Roman, Arial, or Courier fonts. Please submit your assignment.

default image
July 1, 2023
    

Primary Discussion Response is due by Wednesday (11:59:59pm Central), Peer Responses are due by Sunday (11:59:59pm Central).

Primary Task Response: Within the Discussion Board area, write 300–500 words that respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discussions by your classmates. Be substantive and clear, and use examples to reinforce your ideas.

Interest groups play a significant role in contemporary American politics, on a wide range of public policy issues, from healthcare (Affordable Care Act, for example) to gun control (the NRA is a well-known example), and from financial services regulation to regulating food production.

For this discussion board, choose an interest group that appeals to you and then identify a public policy issue that your selected interest group is working on impacting. In addition, include the following information:

  • What types of activities are conducted by your interest group? Provide examples of activities undertaken by the group within the last 12 months. Activities can include lobbying, television or radio spots, media spots, rallies or other activities. Also, if available, provide links to any news articles about the organization’s activities or press releases from the organization or other articles from the organization’s website for your classmates’ reference.
  • How is your chosen interest group connected to the average citizen, if at all? Provide examples of average citizens’ involvement in your chosen interest group, if any. If your chosen interest group rarely or does not interact with the average citizen, please discuss how the work of your chosen interest group indirectly impacts the average citizen, if at all.
  • Do you believe that interest groups do, or have the ability to, promote corruption in government? Explain your position. If they do or have the potential to do so, why do you believe so? If not, what do you think prevents them from corrupting government? Support your position with specific examples.

Responses to Other Students: Respond to at least 2 of your fellow classmates with a reply of at least 100 words about their primary task response. To help you with your discussion, please consider the following questions:

  • What did you learn from your classmate's posting?
  • What additional questions do you have after reading the posting?
  • What clarification do you need regarding the posting?
  • What differences or similarities do you see between your posting and other classmates' postings?

 

 

 

 

 

Individual project

 

Weekly tasks or assignments (Individual Projects) will be due by Monday and late submissions will be assigned a late penalty in accordance with the late penalty policy found in the syllabus. NOTE: All submission posting times are based on midnight Central Time.

PHASE 3 OUTLINE - THIS PROJECT MUST BE SUBMITTED IN OUTLINE FORM

After researching your topic and finding reliable sources, the next step is to use the information you have found to develop a working outline. In this assignment, you will build from your annotated bibliography. Using the same topic you researched in phase 2, you will plan and outline a Problem/Solution essay. You will use this outline to create a rough draft.

Before creating your first draft of the Problem/Solution essay, you will create a double-spaced outline that plans out your Problem/Solution essay in process.

The outline should begin with your Thesis Statement and introduce the Problem/Issue.

A well-integrated outline will include evidence of outside research integration, including specific statistics and data. Avoid using single word descriptions.  The stronger outline will be the more detailed and developed outline. 

Your Outline should contain the following:

  • A thesis statement
  • Topic sentences
  • Supporting information in the form of quotes or paraphrased passages
  • A properly formatted reference page with at least two reliable sources
  • Proper in text citations

In addition to these structural guidelines your individual project should also contain the following:

  • A cover page
  • Headers
  • Page numbers

Be double-spaced using 12 point, Times New Roman, Arial, or Courier fonts. Please submit your assignment.

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