Consider the following table showing year and annual sales (in Lakh ₹)
| Year | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 |
| Annual sale | 3.6 | 4.3 | 4.3 | 3.4 | 4.4 | 5.4 | 3.4 | 2.4 |
A. The 3-year moving average from 2002 to 2004 is 4.00
B. The 3-year moving average from 2005 to 2007 is 3.73
C. The 5-year moving average from 2001 to 2005 is 4.00
D. The 5-year moving average from 2004 to 2008 is 3.83
E. The 4-year moving average from 2001 to 2004 is 3.90
Choose the correct answer from the options given below :
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A, C, E only
$\text{3 years moving average}=\frac{\text{Sum of 3 consecutive year}}{3}$
(A) $\frac{4.3+4.3+3.4}{3}=\frac{12.0}{3}=4.00$
(C) $\frac{3.6+4.3+4.3+3.4+4.4}{5}=\frac{20.0}{5}=4.00$
(E) 4 Year moving average,
$\frac{3.6+4.3+4.3+3.4}{4}=\frac{15.6}{4}=3.90$