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**State whether the following is True or False :**

Seasonal variation can be observed over several years.

#### Options

True

False

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#### Solution

Seasonal variation can be observed over several years **True**.

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#### RELATED QUESTIONS

Use the method of least squares to fit a trend line to the data in Problem 1 above. Also, obtain the trend value for the year 1975.

The following table gives the production of steel (in millions of tonnes) for years 1976 to 1986.

Year |
1976 | 1977 | 1978 | 1979 | 1980 | 1981 | 1982 | 1983 | 1984 | 1985 | 1986 |

Production |
0 | 4 | 4 | 2 | 6 | 8 | 5 | 9 | 4 | 10 | 10 |

Fit a trend line to the above data by the graphical method.

Moving averages are useful in identifying _______.

An overall upward or downward pattern in an annual time series would be contained in which component of the times series?

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The following trend line equation was developed for annual sales from 1984 to 1990 with 1984 as base or zero year. Y = 500 + 60X (in 1000 Rs). The estimated sales for 1984 (in 1000 Rs) is:

Which component of time series refers to erratic time series movements that follow no recognizable or regular pattern?

**Fill in the blank :**

_______ component of time series is indicated by a smooth line.

**Fill in the blank :**

_______ component of time series is indicated by up and down movements without any pattern.

Irregular variation is not a random component of time series.

**Choose the correct alternative:**

Which of the following can’t be a component of a time series?

** **Which component of time series refers to erratic time series movements that follow no recognizable or regular pattern?

**Choose the correct alternative:**

The following trend line equation was developed for annual sales from 1984 to 1990 with 1984 as base or zero year.

Y = 500 + 60X (in 1000 ₹). The estimated sales for 1984 (in 1000 ₹) is

**Choose the correct alternative:**

An overall upward or downward pattern in an annual time series would be contained in which component of the times series?

______ components of time series is indicated by a smooth line

______ component of time series is indicated by periodic variation year after year.

**State whether the following statement is True or False: **

Seasonal variation can be observed over several years

Cyclical variation can occur several times in a year.