For the given five values 10, a, 13, b, 25, the 3-years moving averages are 15, 18, 19. The value of a+b is

A company is shut down due to unavailability of electricity due to non payment of electricity Bill because of some unavoidable circumstances. Under which component of time series does this situation fall?

Assuming the same rate of change continues for the following data:

The equation of the straight line trend using the least square method is:

Based on the data available for the production ($y_i$ in thousand tons) of a cloth factory for 7 years ($x_i$) using the method of least squares, the straight line trend is given by $y - a + bx$ with $\sum y_i = 608, \sum x_i = 0, \sum x_iy_i = 116, \sum x_i^2 = 28$. Then, the increase in production per year is:

Time series helps to

(A) derive conclusions after arranging the time series in a systematic manner.

(B) predict the future behavior of a variable.

(C) study the past behavior of data.

(D) plan future operations.

Choose the correct answer from the options given below:

Which of the following are components of a time series ?

(A) Irregular component

(B) Cyclical component

(C) Chronological Component

(D) Trend Component

Choose the correct answer from the options given below :

For the given five values $16, 25, 19, 34, 46$, the three years moving averages are