Confidence Intervals

Skill Type Description Source
Confidence Intervals for the Mean Webpage This webpage introduce how to produce the confidence intervals based on the normal distribution, when the population standard deviation is known&unknown. It also explains how to calculate the confidence intervals when the sample is small. OSE
Confidence Intervals Webpage This webpage introduce how to construct a confidence intervals. At the end, one question is provided to test your understanding, and the answer is very well explained. AP
Confidence Interval Video - 14:03 mins This video explains what the confidence intervals present under the normal distribution. Khan Academy
Margin of Error 1

Margin of Error 2
Video - 15:02 mins

10:05 mins
These videos explain what the margin of error is defined via the confidence intervals. Khan Academy
Confidence Intervals for a proportion Video - 18:35 mins This video demonstrates how to calculate the confidence intervals for a proportion using an example. Khan Academy
Small Sample Size Confidence Intervals Video - 11:11 mins This video demonstrates how to calculate the confidence intervals for a small data, and explains why to use the t distribution instead of the normal distribution for a small sample. Khan Academy
Small Sample Size Confidence Intervals 2 Video - 11:46 mins This video shows another example for calculating the confidence intervals of a small sample. Khan Academy
Confidence Interval of Difference of Means

Clarification (2:41 mins)
Video - 15:49 mins This video demonstrates, given two normal distributions, how to produce the confidence intervals for the mean difference. Khan Academy


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23 February 09