stats term test

 When asked to describe a univariate distribution always remember to describe:

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 we 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

y - y(hat) (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:

the standard deviation of the residuals which is the typical distance between the actual y-values and the predicted y-values (IN CONTEXT)

SRS -Simple Random Sample -

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

Four principles of a well designed experiment: 

Comparison, Random Assignment, Replication, Control