Use the following information for problems 13.
Consider following time series data shown in table below:
Year

Crop Yield

Rainfall

Temperature

1996
1997
1998
1999

208
215
204
196

25.0
28.2
25.6
23.5

53.2
58.5
55.1
52.6

1. Find out the time period used by data?
a. day
b. week
c. month
d. year
2. What is independent variable?
a. crop yield
b. rainfall
c. year
d. temperature
3. What is 3year moving average for crop yield?
a. 209
b. 208
c. 207
d. 205
4. Horace Mann, principal of the Jones Public School, has decided to develop a time series model to obtain the 2 and a 3period moving average to forecast student enrollments for next term.
Which statement is true concerning the accuracy of each forecast that Horace will obtain?
a. The 2period forecast will be more accurate than the 3period forecast.
b. The 3period forecast will be more accurate than the 2period forecast.
c. Both forecasts will be equally accurate.
d. Either forecast could be more accurate than the other.
5. Media Company has gathered 15 months of time series data for sales of new product since it was commercialized. Media has decided to apply a 5month moving average model to the data. How many squared error terms should be summed in order to obtain mean square error (MSE)?
a. 15
b. 10
c. 9
d. 5