1+Stats+1.1.5+,+1.1.6

=Objective(s):= __After this class, student should be able to:__

1.1.5 Deduce the significance of the differences between two sets of data using calculated values for t and the appropriate tables 1.1.6 Explain that the existence of a __correlation__ does not establish causal relationship between two variables

= **Lesson: t-values & Correlation ** =


 * What are "t-values"**
 * t-values are for determining differences between two "things:"
 * traits in two groups (men & women's heights)
 * or between to measurements of a group (Height after eating kimchi every day for one year and height after eating no kimchi at all for one year)introduce "normal distribution" and the bell curve; explain its significance
 * t-values fall on a distribution curve