In: Statistics and Probability
Use alpha= 0.05 to test the following time series for positive autocorrelation.
Period   Sales
1   2
2   5
3   9
4   6
5   6
6   9
7   10
8   12
9   10
10   13
11   18
12   11
13   13
14   13
15   14
a) Determine the Durbin-Watson statistic.
(Round to two decimal places as needed.)
b) Identify the critical values.
dL=
dU=
(Round to two decimal places as needed.)
Excel:
Data --> Megastat --> Regression analysis

(a) Durbin-Watson statistic = 1.90
(b)

dL= 1.08
dU= 1.36