When a portion of the sample does not respond to the survey, ____ has occurred.
a. a measurement error
b. nonresponse bias
c. a sampling error
d. systematic failure
e. a nonlinear error
Question 2
In a moving averages method, which of the following represent(s) the number of terms in the moving average?
a. a smoothing constant
b. the explanatory variables
c. an alpha value
d. a span