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Punjab (PTB) · Half book test · Free

2nd Year Statistics Second half Book Paper

50 marks · 1 hour 30 minutes · 35 questions. Covers: 4 chapters (CHAP 14: Simple Linear Regression And Correlation to CHAP 17: Orientation Of Computers ).

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2nd Year Statistics Second half Book Paper

2nd Year · Statistics · Punjab (PTB)

Name: ____________Roll No: ________Class/Section: ________Date: ________Total marks: 50Time: 1 hour 30 minutes

Q1. Multiple choice questions (Attempt all · 15 × 1 = 15)

  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. If the two attributes A and B have perfect negative association, then the Yates coefficient of Association is equal to:

    1. +1

    2. 0.87

    3. -1

    4. -0.83

  3. The standard keyboards has buttons:

    1. 100

    2. 101

    3. 103

    4. 102

  4. The formula for the regression coefficient of y on x is:

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

    1. Secular trend

    2. Seasonal variation

    3. Cyclical variation

    4. Random variation

  6. A characteristic which varies in quality from one individual to another is called:

    1. Variable

    2. Statistics

    3. Attributes

    4. Regression

  7. The main memory has many storage:

    1. Directions

    2. Locations

    3. Positions

    4. Hubs

  8. y is the ...... of two regression coefficients bxy and byx

    1. Arithmetic Mean

    2. Geometric Mean

    3. Harmonic Mean

    4. None of these

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

    1. Secular trend

    2. Seasonal variations

    3. Cyclical variations

    4. Irregular variations

  10. Both the coefficient of correlation and the coefficient of association lie between:

    1. 0 and 1

    2. -1 and 0

    3. -1 and 1

    4. -2 and 2

  11. Control unit and arithemetic unit are part of:

    1. CPU

    2. Program

    3. Language

    4. Input

  12. If the movements of the variables X and Y are in the opposite direction, the correlation between X and Y is said to be:

    1. Positive

    2. Negative

    3. Zero

    4. -1

  13. A second degree parabola has:

    1. Two constants

    2. Three constants

    3. 2 or 3 constants

    4. Less than 2 constants

  14. If any ultimate class frequency is negative, the data will be:

    1. Inconsistent

    2. Constant

    3. Correlated

    4. None of these

  15. Hertz is measure of number of........ per second:

    1. Oscillation

    2. Repetition

    3. Vibrations

    4. Combination

Q2. Short questions (Attempt any 10 of 15 · 10 × 2 = 20)

  1. Define 'signal' and 'noise'.

  2. What is rank correlation?

  3. Explain correlation and causation.

  4. Explain the term data.

  5. What is forecasting?

  6. What is the criterion of independence with respect to the two attributes A and B?

  7. Determine the estimated regression equation  in the following case: n = 8, .

  8. What are the main distinctions between storage and memory?

  9. Given . Determine the value of "b".

  10. What are the properties of rank correlation coefficients?

  11. Given n = 100,  and . Calculate the regression lines of Y on X and of X on Y.

  12. Differentiate the term accuracy and diligence.

  13. Estimate y for x = 10 form the information n = 5, .

  14. Given (A) = 30, (B) = 60 and n = 150, find (AB).

  15. If a = 130, b = 3.956, then estimate y for X = 12.

Q3. Long questions (Attempt any 3 of 5 · 3 × 5 = 15)

  1. If the linear trend in the data for the years 1960 to 1965 both inclusive with origin at the middle of 1962 and 1963 is , the unit of x being one year, then determine the trend line with origin at 1960 and hence determine the trend values.

  2. From the given rankings of 10 students in Statistics and Economics

    Statistics (x) 1 2 3 4 5 6 7 8 9 10
    Economics (y) 2 4 3 1 7 5 8 10 6 9

    Compute the coefficient of rank correlation.

  3. Find correlation coefficient for the following information. , Sx = 7.73, Sy = 8.04, n = 10.

  4. Explain the Control Unit.

  5. If the second degree parabola fitted to the data for 1970 to 1979 (both inclusive) with origin at the middle of 1974 and 1975 is Y = 100. 356 + 11.333X + 1.006X2, the unit of X being half year, find the trend values corresponding to the years 1970-79.