18.In a multiple regression analysis with three independent variables the null hypothesis for conducting the test of the overall model is:

H_o: ₀= ₁= ₂= ₃= 0.

T/F

24.The time series component that is often referred to as "noise" because it has no detectable pattern is the ________ component.

trend

cyclical

random

seasonal

29.The average forecasting error for a time-series technique can be determined through the mean absolute deviation.

True

False

30.The presence of autocorrelation in a time series could result in concluding that the regression coefficient for the trend line is statistically significant when, in reality, it is not.

True

False