Question

QUESTION 9

1. Q9. For a time series with 17 time periods, the following linear trend expression was y'_t = 130.4 + 4.2t estimated: The forecast for time period 18 is _____________________

   	a.	197.6
   	b.	68.4
   	c.	206.0
   	d.	167.7
   	e.	None of the above

QUESTION 10

1. Q10:  Which of the following inferences can be drawn from the scatter chart of residuals given below?
   

   	a.	The residuals have a varying variance.
   	b.	The model captures the relationship between the variables accurately.
   	c.	The regression model follows the F probability distribution.
   	d.	The residual distribution is consistently scattered about zero.
   	e.	None of the above

Answer 1

1) There are Two cases when residuals have varying variance. Inward oppening funnel In this case residuals does not have constant variance. It is decreasing function ☺ ei Y 1 outward oppening funnel Here, tesidudts dars not have constant Variances It is increasing function li ce Yi