Discussion Post- Inferential Statistics

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Confidential Intervals

Please go to and follow the instructions for the tutorial.  (The tutorial button is located in the lower middle of the screen.)  Then answer the following questions:

  1. How did the applet visually show the confidence interval and the point estimate for the population mean?
  2. How did the applet visually show a confidence interval that did NOT capture the population mean? How often would we expect this to occur?
  3. What happened to the confidence intervals when the level of confidence increased to 99%?
  4. What happened to the confidence intervals when the sample size was increased to 40?

5. Did the applet help you understand what confidence intervals are?  In your own words, what are confidence intervals?

https://www.zoology.ubc.ca/~whitlock/Kingfisher/CIMean.htm