We werImportance of Relationships<br/>Confidence intervals

provide a range of values, along with a level of confidence, to serve as an estimate of some unknown population value.  We rarely have access to the entire populations so we rely on the confidence interval of the samples to heuristically draw some inference about the population being studied. Prerequisites for inferences mandate that we understand components of the intervals—variability in the data, sample size, and confidence level—impact the width of the interval.
Task – explore the relationship among these components and understand trade-offs between reducing risk in our confidence of estimates and increasing precision.
Preparation:
Readings –

-Chapters 7 and 8 of the Frankfort-Nachmias &amp; Leon-Guerrero and in Chapter 8, p. 256, keeping in mind the 2012 Benghazi Terrorist Attack Investigation and focus on how different levels of confidence and sample size work together.
-Magnusson’s web blog to augment visualization and understanding of confidence intervals.
-Use the Course Guide and Assignment Help found in this week’s Learning Resources to search for a quantitative article related to confidence intervals.Using SPSS and the General Social Survey dataset and select the quantitative variable HOW MUCH DID YOU HELP HOMELESS IN LAST YEAR  (dirhelp)?

-Take a random sample of 100.
-Calculate the 95% confidence interval  HOW MUCH DID YOU HELP HOMELESS IN LAST YEAR
-Calculate a 90% confidence interval.
-Take second random sample of 400 and .
-Calculate the 95% confidence interval for HOW MUCH DID YOU HELP HOMELESS IN LAST YEAR
-Calculate a 90% confidence interval.Display result and graphs from chartbuilder .   Post results along with explanations of how different levels of confidence and sample size affect confidence interval widths.  Then, consider the statement, “Confidence intervals are underutilized” and explain what the implications might be of using or not using confidence intervals. Provide examples based on the data results and share research to support findings.
APA writing style and replicable results

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