Irregular variations in a time series is :

Which of the following graph plotted for the months against the three month moving average(3Yr MA) represents the given data correctly ?

[Four line graphs labelled 1-4, each plotting 3-Yr MA against month, showing different curve shapes and values]

Which of the following are normal equations to fit a straight line trend y = a + bx by the method of least squares?

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:

The sale of ice creams is higher in summer than in winter is an example of

The pattern and behavior of the data in any time series are based on which of the following components:

(A) Secular trend component

(B) Seasonal component

(C) Cyclical component

(D) Irregular component

Choose the correct answer from the options given below:

The number of letters posted in a certain city on each day for a week is given as follows: 40, 55, 28, 25, 31, 52, 43. Which of the following is not an entry in the three-day moving averages?