2nd Year Statistics Chapter 7 TestAnalysis Of Time Series

Q1. Multiple choice questions (Attempt all · 10 × 1 = 10)

1. If an annual time series consisting of an even number of years is coded, then each coded interval is equal to:

   1. One year

   2. Half year

   3. Two years

   4. None of these

2. Increase is demand of ice in summer is an example of:

   1. Secular trend

   2. Seasonal variation

   3. Cyclical variation

   4. Random variation

3. Repetitive movements around the trend line in one year or less is:

   1. Secular trend

   2. Seasonal variations

   3. Cyclical variations

   4. Irregular variations

4. A second degree parabola has:

   1. Two constants

   2. Three constants

   3. 2 or 3 constants

   4. Less than 2 constants

5. Increase use of mobile phones in Pakistan is example of ...... variation:

   1. Trend

   2. Seasonal

   3. Cyclical

   4. Irregular

6. The recession in the business is:

   1. Secular trend

   2. Seasonal variation

   3. Cyclical movement

   4. Irregular

7. A trend is the better fitted trend for which the sum of the squares of errors is:

   1. Maximum

   2. Minimum

   3. Least

   4. B and c but not a

8. The differences between the actual value and trend value is called:

   1. Slope

   2. Residual

   3. Intercept

   4. Sum of residual

9. Suppose that a particular time series should be fitted with a linear trend . What do the X's represent in this formula?

   1. Coded values of the time variable

   2. A numerical constant that is determined by a formula

   3. Estimates of the dependent variable

   4. None of these

10. For a least squares linear trend , the  when:

    1. All the y-values lie on the line

    2. All the y-values are positive

    3. All the y-values lie above the line

    4. None of them