Suppose that 40 percent of the voters in a particular region support a candidate. Find the probability that a sample of 900 voters would yield a sample proportion in favor of the candidate within 3 percentage points of the actual proportion.

A common belief holds that the larger the population for which an estimate is being made, the larger the sample needs to be. By this logic, a much larger sample would be needed to estimate the proportion of the U.S. Army’s 2.4 million active duty and reserve personnel who approved the repeal o…

The life of Powerlong batteries, sold in packs of 6, may be assumed to have a normal distribution with mean 32 hours and standard deviation x hours. Find the value of x so that for one box in 100 (on average) the mean life of the batteries is less than 30 hours.

You want to choose an SRS of the 7200 salaried employees of a corporation. You label the employees 0001 to 7200 in alphabetical order. Using the line of random digits given below:

81486 69487 60513 09297 00412 71238 27649 39950

your sample contains the employees labeled _________?

a. 6694, 5130, 0041, …

1. Add a column to the right of each distribution of averages and use Excel’s formula to obtain the distribution of the corresponding Normal Distribution.
2. Create a graph with the 4 normal distributions against the scale oand conclude on the result…
3. Create a graph showing the normal distribution corresponding to the original data, together with the normal distributions corresponding to the averages
   with each sampling size.

Calculate the effect of removing y1 from the sample y1, y2, … , yn in accuracy of your
sampling

Deliverable Length:3-4 page reportDue Date:6/4/2012

How Many People to Survey?

Gallup poll results are prevalent in the media especially leading up to elections as are reports on surveys done by universities and research groups like the Pew Research Center.

The survey results of small groups of people are used to portray a general consensus about a population. Ever wonder how many people should be included in a survey to make it a meaningful reflection of a population? Now you will be able to answer your own question. Be warned; you will never feel the same about these polls and surveys again.

Using the following specific resources, create a lecture (with citations) which includes the following:

Part 1: Survey Analysis

Entertainment SurveyUsing a newspaper article from AIU library’s full-text database: National Newspapers (Proquest), create a lecture (with citations) which includes the following:

• Describe an entertainment poll or survey. Analyze the number of people who participated in the sample compared to the number in the population. Most news articles will not provide information on the number of people surveyed. In this case critique the validity of the results. (Be sure to cite the article which must be from National Newspapers -ProQuest) Here is aResearch Guide.
• Discuss how the results of the survey can be used to tell a story or support an idea of the sponsoring company or media group.

Political SurveyUsing polls from one of the following sources:

Source 1

Source 2

• Describe a political poll or survey. Analyze the number of people who participated in the sample compared to the number in the population.
• Discuss how the results of the survey can be used to tell a story or support an idea of the sponsoring company or media group.

General SurveyUsing polls from one of the following sources:

Source 1

Source 2

• Describe a general opinion poll or survey. Analyze the number of people who participated in the sample compared to the number in the population.
• Discuss how the results of the survey can be used to tell a story or support an idea of the sponsoring company or media group.

Overview

Consider the three surveys presented.

• Using the knowledge you learned from the textbook, compare and contrast the sample sizes in each of the three surveys mentioned in the post and determine if the samples sizes are appropriate.
• In your opinion, which appears to be the most valid? (Cite and reference the textbook)

This section of the paper will be 2-3 pages in length and each survey or poll described MUST come from AIU Library’s National Newspapers- ProQuest Database and Pew Research Center or Gallup.

Please do not use quotes or copy definitions. You will not receive credit for understanding the materials if you use the words of others. Keep in mind that since you did research and you have citations in the body of the post, you must also place a reference list at the end containing the textbook and the articles cited.

Part 2: ApplicationCreate your own 3 question Entertainment or usingthisGeneral Opinion Surveyor another free survey program or thislink. Secure a minimum of 20 responses. Your survey respondents may be friends, family or classmates. (NOTE: The small sample size was chosen for convenience and as you know is not a valid sample. The goal is for you to create, deploy and analyze a simple survey.)Create Excel charts of your results and describe thosecharts in words. (You will receive no credit for charts that are copied from the survey software.)

• Include a copy of your survey
• Provide charts of your results and describe those charts in words
• Explain how the results of your survey can be used by a media group or company.

This section of the paper will contain 1 page of text and 3 charts.

Please submit your assignment as aWord document in APA format using theattachedTEMPLATE. Using the template without deleting the headings ensures that you cover each segment of the assignment.

Deliverable Length: 2paragraphs = 300 words.

SAMPLE SIZE DETERMINATION

Determining sample-size is important step when planning a statistical study. It is also quite a difficult task since many variables must be considered.

MAIN DISCUSSION POST: Due by Saturday

In Yahoo! use the search term “Sample Size Determination.” Select a University or Government webpage that discusses the topic. Do not use Wikipedia, eHow or about.com or other resource that is not written or published by a University or the US Government.

• Paragraph 1: In simple terms explain what researchers must go through to select the right sample size for a study. (Be sure to cite and reference the website)

In Yahoo! use the search term “Sample Size Calculator.” Select two calculators you like best.

• Paragraph 2: Explain how the calculators work. Test the two calculators using a population, confidence level and confidence interval you select. Discuss the results. (Be sure to cite and reference the website)

Please do not use quotes or copy definitions. You will not receive credit for understanding the materials if you use the words of others. Keep in mind that since you did research and you have citations in the body of the post, you must also place a reference list at the end containing the textbook and the articles cited.

Do not use file attachments.