When a histogram is negatively skewed, it ________. A) is ...

[future617RT]

When a histogram is negatively skewed, it ________.
 
  A) is symmetrical
  B) tails off to the left
  C) has a slope lesser than one
  D) tails off to the right

Question 2

Test the hypotheses H0 : There is no first-order autocorrelation vs. H1: There is positive first-order autocorrelation, given that: Durbin-Watson Statistic d = 1.12, n = 45, k = 5, and  = 0.05
 
  What will be an ideal response?

[ebenov]

Answer to Question 1

B

Answer to Question 2

dL = 1.29 and dU =1.78
The decision is made as follows:
If d < dL = 1.29, reject H0 and conclude that positive autocorrelation is present.
If 1.29 = dL  d  dU = 1.78, we say that the test is inconclusive.
If d  dU = 1.78, we conclude that there is no evidence of positive autocorrelation.
Since d = 1.12, we reject the null hypothesis and conclude that positive autocorrelation is present.