If for the following data:

Year	2001	2002	2003	2004	2005	2006	2007
Production (in lakh tonnes)	30	35	36	32	37	40	36

Using straight line trend by the method of least squares, the trend value for the year 2009 is :

In a time series, the variations which occur due to general tendency of the data to increase or decrease over a long term are known as:

In the month of January, the number of cases diagnosed of influenza epidemic are given in the following table

The 3-day moving averages are:

For the given five values, 13, 17, 21, 22, 32; the 3-year moving averages are:

Which of the following are the components of a time series?

(A) Cyclic component

(B) Regular component

(C) Seasonal component

(D) Economic component

Choose the correct answer from the options given below:

In reference to the above data, which of the following statements are correct? (where $x = t - 2013$)

(A) If the equation of the straight line trend is $y = 12 + 2.29 x$, then the trend value for the year 2017 is 21.16.

(B) If the equation of the straight line trend is $y = 12 + 2.29 x$, then the trend value for the year 2013 is 11.

(C) If the equation of the straight line trend is $y = 12 + 2.29 x$, then the trend value for the year 2015 is 17.

(D) If $(t_1, y_2),(t_2, y_2),(t_3, y_3),......,(t_n, y_n)$ denote the time series and $y_t$ are the trend values of the variable y, then $\sum(y - y_t) = 0$.

Choose the correct answer from the options given below:

Irregular variations in a time series is :