Question

1.If a time series exhibits a strong, linear upward trend, the value of the correlation coefficient, r, is expected to be positive and close to -1. True or False

2.The value of the coefficient of determination R² ranges between:

A	0 and -1
	B	-1 and +1
	C	0 and +1
	D	- infinity and + infinity
	E	+1 and + infinity

3.The average time each customer spends in the queue is referred to as

A	W
	B	Wq
	C	L
	D	Lq
	E	?

Answer 1

1.If a time series exhibits a strong, linear upward trend, the value of the correlation coefficient, r, is expected to be positive and close to -1. True or False

Answer = TRUE

• value -1.00 or 1.00 indicates perfect and strong correlation ( perfect linear)
• value close to 0 indicates weak correlation

2.The value of the coefficient of determination R2 ranges between:

Answer = (C) 0 and +1

• R² coefficient of determination is a statistical measure of how well the regression predictions approximate the real data points
  

?3.The average time each customer spends in the queue is referred to as

Answer = (B) Wq