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

In the measurement of secular trend the moving averages

• give the trend in a straight line A
• measure the seasonal variations B
• smoothes out a time series C
• measure irregular fluctuations D

When b_xy is positive, then b_yx will be _______.

• Negative A
• Positive B
• Zero C
• One D

Non probability form of sampling is

• quota sampling A
• sampling with replacement B
• sampling without replacement C
• none of these D

In simple linear regression, the number of unknown constants are:

• Two A
• Three B
• Four C
• Five D

The relationship that describes the dependence of the expected value of the dependent random variable for a given value of the independent non-random variable is called

• equation A
• relation B
• ratio C
• regression D

A quantitative statement about a population is called:

• Research hypothesis A
• Composite hypothesis B
• Simple hypothesis C
• Statistical hypothesis D

The rise and fall of a time series periods longer than one- year is called.

• Secular trend A
• Seasonal variation B
• Cyclical variation C
• Irregular variation D

A region for which the H_o is rejected is called

• acceptance region A
• rejection region B
• critical region C
• both b and c D

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

Is sampling without replacement, an element can be chosen:

• Less than once A
• More than once B
• Only once C
• Difficult to tell D

The sum of deviations=Σ(y-ŷ) =

• 0 A
• 1 B
• 10 C
• -1 D

The trend values in freehand curve method are obtained by:

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

If sampling is done without replacement then no

• Nⁿ A
• ^NC_n B
• ^Np_" C
• N x N D

P(μ-2σ < X=< μ + 2σ)=

• 0.6827 A
• 0.9545 B
• 0.9973 C
• 0.9827 D

In time series seasonal variations can occur within a period of:

• Nine years A
• Four Years B
• Three years C
• One year D

The hypothesis which is tested for possible rejection is called

• common hypothesis A
• null hypothesis B
• alternative hypothesis C
• wrong hypothesis D