12th Class Statistics MCQ Test With Answer for Statistics Full Book

The standard error of the estimate increased by decreasing

• population A
• sample size B
• errors C
• precision D

Level of significance is also called:

• Power of the test A
• Size of the test B
• Level of confidence C
• Confidence coefficient D

The elimination or addition of a few more time periods may change its

• speed A
• value B
• direction C
• none of these D

The equation of the quadratic (parabolic) trend is

• ŷ=a+bx A
• ŷ=a+by B
• ŷ=a+bΣx+cΣx² C
• ŷ=a+bx+cx² D

The normal distribution is a bell shaped_______ distribution.

• Discrete A
• Continuous B
• Symmetrical C
• Skewed D

If the value of any regression coefficient is zero, then two variable are _______.

• Qualitative A
• Correlation B
• Dependent C
• Independent D

The total area under the curve of chi-square distribution is_______.

• 1 A
• 0.5 B
• 0 to ∞ C
• -∞ to +∞ D

A sample is usually selected by_______.

• With A
• Without B
• Finite C
• Infinite D

The S.D of the sampling distribution of a statistics is called _______.

• Standard error A
• Serious error B
• Dispersion C
• Difference D

• y-intercept A
• x-intercept B
• slope C
• none of these D

The variable, whose resulting value depends upon the selected value of the independent variable is called______.

• Regression A
• Regressor B
• Regressand C
• Coefficient D

The normal distribution is represented as_______

• N (μ,σ²) A
• N (n,p) B
• N (0,σ²) C
• None of these D

An estimator is ------------ if its expected value is equal to the population parameter to be estimated

• bad A
• biased B
• unbiased C
• none of these D

r is the ------------ of two regression co-efficient b_yx and b_xy

• arithmetic mean A
• geometric mean B
• harmonic mean C
• median D

In a normal distribution β₁ = 0 and β₂ = __________.

• 2 A
• 4 B
• 3 C
• 5 D

The trend values in freehand curve method are obtained by:

• Equation of straight line A
• Second degree parabola B
• Signal C
• Graph D

• best estimators A
• biased estimators B
• unbiased estimators C
• normal estimators D