Companion notes for z-scores, z-tables, quartiles, normal curve percentages, and standard normal comparisons.
A JoeCMath companion guide for finding the smaller percentage regions of a normal curve using the 68-95-99.7 rule.
A JoeCMath companion guide for finding the smaller percentage regions of a normal curve using the 68-95-99.7 rule.
A JoeCMath companion guide for finding the first and third quartiles on a normal curve by using the four quartile regions.
A JoeCMath companion guide for choosing whether to use z-scores, standard-deviation templates, or quartiles for normal curve area questions.
A JoeCMath companion guide for the empirical rule, using normal curve intervals within one, two, and three standard deviations of the mean.
A JoeCMath companion guide for using left-tail z-tables to find normal distribution areas below, above, and between z-scores.
A JoeCMath companion guide for why z-scores convert normal distribution values into standard normal values.