AP Stats Unit 9

Linear

Linear scatter plot and residual plot shows no curvature

Independent

less than 1/10

Normal

residual dot plot shows no strong skew or outlier

Equal SD

no obvious heteroskedastic trend in the residual plot

Random

Random selection

B

the true slope of the population LSRL for x and y

a

When the (explanatory variable) is zero (units), our model predicts that the (response variable) would be (y-intercept)

b

for every 1 (unit) increase in (explanatory variable), our model predicts an average increase/decrease of (slope) in (response variable)

s

When using the LSRL with (explanatory variable) to predict (response variable), we will typically be off by (value of s with units of response variable y)

SEb

the slope of the sample LSRL typically varies from the slope of the population LSRL by about x units