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1)
If all the values fall on the same straight line and the line has a positive slope then what will be the value of the correlation coefficient ‘r’:
- A) 0 ≤ r ≤ 1
- B) r ≥ 0
- C) r = +1
- D) r=-1
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2)
If a curve has a longer tail to the right, it is called:
- A) Positively skewed
- B) Negatively skewed
- C) J-shaped
- D) Symmetric
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3)
Which one of the following is not included in measures of central
- A) Quartile deviation
- B) Harmonic mean
- C) Geometric mean
- D) Arithmetic mean
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4)
Which of the following is not based on all the observations?
- A) Arithmetic Mean
- B) Geometric Mean
- C) Geometric Mean
- D) Mode
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5)
What is the Standard Deviation of 7, 7, 7, 7, 7, 7, 7
- A) 49
- B) 1
- C) 0
- D) 7
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6)
In measures of relative dispersion unit of measurement is:
- A) Changed
- B) Vanish
- C) Does not changed
- D) Dependent
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7)
The F-distribution always ranges from:
- A) 0 to 1
- B) 0 to -∞
- C) -∞ to +∞
- D) 0 to +∞
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8)
In chi-square test of independence the degrees of freedom are:
- A) n - p
- B) n - p-1
- C) n - p- 2
- D) n – 2
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9)
The Chi- Square distribution is continuous distribution ranging from:
- A) -∞ ≤ χ2≤ ∞
- B) -∞ ≤χ2 ≤1
- C) -∞ ≤χ2 ≤0
- D) 0 ≤ χ2≤ ∞
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10)
If ŷ is the predicted value for a given x-value and b is the y-intercept then the equation of a regression line for an independent variable x and a dependent variable y is:
- A) ŷ = mx + b, where m = slope
- B) x = ŷ + mb, where m = slope
- C) ŷ = x/m + b, where m = slope
- D) ŷ = x + mb, where m = slope
