Hi, what do you want to do?
Khan Academy
Khan Academy: Statistics: Normal Distribution Problems: Z Score
Video gives examples of calculating z-scores for a problem when the mean and standard deviation are given. Includes link to practice problems. [7:48]
Khan Academy
Khan Academy: Statistics: More Empirical Rule and Z Score Practice
Video example of calculating z-scores and explaining how z-scores apply to non-normal distributions. Also shows example of using empirical rule to calculate probability. Includes link to practice problems. [5:57]
Khan Academy
Khan Academy: Normal Distribution: More Empirical Rule and Z Score Practice
Video example of calculating z-scores and explaining how z-scores apply to non-normal distributions.
Khan Academy
Khan Academy: Normal Distribution: Z Score
Video gives examples of calculating z-scores for a problem when the mean and standard deviation are given.