L10 & L11 Social Science Statistics

 By the end of lesson 10, you should be able to:

  • Calculate and interpret a confidence interval for a population mean given a confidence level.
  • Explain how the margin of error changes with the sample size and the level of confidence.
  • Identify a point estimate and margin of error for the confidence interval.
  • Show the appropriate connections between the numerical and graphical summaries that support this confidence interval.
  • Check the requirements of the confidence interval.
  • Calculate a desired sample size given a level of confidence and margin of error.

REMEMBER:

>Margin of error is (z* times sigma)/ square root of n). Ideally it is small.

> To reduce the margin of error: 
  • reduce sigma.
  • increase sample size (n)
  • decrease confidence level (which will reduce z*)
*A confidence interval does NOT tell us:
  • individual values
  • sample means
  • future samples (AVOID words like probability and chance)

L11

Regarding Confidence Intervals for a single mean with � unknown:

  • Calculate and interpret a confidence interval for a population mean given a confidence level.
  • Identify a point estimate and margin of error for the confidence interval.
  • Show the appropriate connections between the numerical and graphical summaries that support the confidence interval.
  • Check the requirements the confidence interval.

Regarding Hypothesis Testing for a single mean with � unknown:

  • State the null and alternative hypothesis.
  • Calculate the test-statistic, degrees of freedom and p-value of the hypothesis test.
  • Assess the statistical significance by comparing the p-value to the α-level.
  • Check the requirements for the hypothesis test.
  • Show the appropriate connections between the numerical and graphical summaries that support the hypothesis test.
  • Draw a correct conclusion for the hypothesis test.

REMEMBER:

  • df = n-1
  • The greater the degrees of freedom, the closer the t- distribution will look to a normal distribution.
  • When we use s instead of sigma for one mean, we call the result the standard error.
  • standard error= st. dev divided by square root of n.

Comments

Post a Comment

Popular posts from this blog

FAML 430 Week 9

  Perron (2019) The Impact of Visual Storytelling in Nonprofit Marketing Links to an external site. 11 Infographics About Infographics Links to an external site.  (scan only) The 16 best infographic makers in 2021 Links to an external site.  (scan only) https://www.psychologicalscience.org/publications/visual-data-communication.html Empathy Over the last few weeks, the topic of empathy has come up in your readings, exam responses, and many of your group discussions as we have learned about the importance of truly understanding the people that we are trying to serve in our community. Empathy is a common term used in the mental health field.  When describing this to my clients, I describe empathy as the ability to see and understand another person’s world or experience without getting lost in it.  An important step in both couples and family therapy is helping each individual to understand and express empathy when communicating. There are a variety of intervention...
Read more

FAML 430 Week 2

  Perhaps the first step in building community is getting to know one another as fellow passengers on the sojourn of life. Then the stranger and foreigner will become familiar. Then our shared beliefs and experience will surface and become a building block for both our sense of community and our tolerance and appreciation of our differences. Optional Readings and Resources If you desire to expand your understanding of Bronfenbrenner's Bioecological Model, you might explore the following articles: Bronfenbrenner & Morris (2007) The Bioecological Model of Human Development Links to an external site. The Vision of Urie Bronfenbrenner: Adults Who are Crazy About Kids Links to an external site.
Read more

Human Rights

  Human Rights and Capabilities Download Human Rights and Capabilities Bystanders to Genocide Links to an external site.  |  Bystanders to Genocide Accessible Version Download Bystanders to Genocide Accessible Version Human Rights and Cultural Relativism  Links to an external site. |  Human Rights and Cultural Relativism Accessible Version Download Human Rights and Cultural Relativism Accessible Version Justice Lost! The Failure of International Human Rights Law to Matter Where Needed Most  Links to an external site. |  Justice Lost! Failure of International Human Rights Law to Matter Where Needed Most Accessible Version   Download Justice Lost! Failure of International Human Rights Law to Matter Where Needed Most Accessible Version  
Read more