Term 1 know colds

What to describe for a univariate distribution?

context, shape, outliers, center, spread

Interpret standard deviation

the typical distance of a value from the mean (IN CONTEXT)

Interpret z-score

the # of standard deviations a value is above/below the mean (IN CONTEXT)

How to describe bivariate data

context, direction, outliers, form, strength

Interpret y-intercept of LSRL

the PREDICTED value of the response variable when the value of the explanatory variable is 0 (IN CONTEXT)

Interpret slope of LSRL

the PREDICTED change in value of the response variable when the value of the explanatory variable increases by one (IN CONTEXT)

Residual formula

y-y (actual minus predicted)

Interpret r2

the proportion of variation in y that can be explained by the regression model of y on x (IN CONTEXT)

Interpret s (standard deviation of residuals)

the typical distance between the actual y-values and the predicted y-values (IN CONTEXT)

What is an SRS?

Simple Random Sample - Gives every possible sample of the desired size (n) an equal chance to be chosen

What are the four principles of a well-designed experiment?

Comparison, Random Assignment, Replication, Control