The Durbin-Watson statistic for a data set gives a value of 0. This means that ________.

The Durbin-Watson statistic for a data set gives a value of 0. This means that ________.
 
  A) the errors for each value of X are normally distributed
  B) the data exhibits autocorrelation
  C) a curvilinear regression model should be used for the data
  D) the data is heteroscedastic

Q. 2

Do these results allow us, at the 5 significance level, to conclude that the model is useful in predicting the price of gold?
 
  What will be an ideal response?

Q. 3

The Kruskal-Wallis test for the difference in population means is based on the ranks of the sample observations.
 
  Indicate whether the statement is true or false

Q. 4

Statisticians have determined that in order for the calculation of sample variance to result in an unbiased estimate, the denominator in the formula must be ________.
 
  A) n - 1
  B) n
  C) n
  D) n + 1

Q. 5

A coefficient of skewness that indicates relative symmetry would lie between ________.
 
  A) 0.5 and -0.5
  B) 5 and -5
  C) 1 and -1
  D) 0.95 and 1

Q. 6

According to the Poisson process in queuing systems, past arrivals do not influence future arrivals.
 
  Indicate whether the statement is true or false