Advance Statistics Test 2

Welcome to your Advance Statistics Test 2

___ censoring occurs when a subject leaves the study before an event occurs.

Select the correct option.

Left

Right

Both (A) & (B)

None of these

Neyman allocation becomes exactly ___ allocation when the standard deviations of all strata are equal.

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Equal

Optimum

Proportional

None of these

Ignoring f.p.c., Var(y_bar_st)Ney =

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sum(Wh * Sh^2)/n

sum(Wh * Sh)/n

sum(Wh^2 * Sh^2)/n

None of these

In factorial experiment, Sign table method and Yates method give:

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Same result

Different result

Opposite result

None of these

In rolling two fair dice, number of all possible elements are:

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When A and B are independent then P(A and B) =

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P(B)

P(A)

P(A/B)

P(A).P(B)

___ distribution is also called double exponential distribution:

Select the correct option.

Gamma

Beta

Laplace

Uniform

Simple random sampling is suitable when population is:

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Heterogeneous

Finite

Homogeneous

None of these

Response surface design is:

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First order

Orthogonal

Rotatable

None of these

If Z is Standard Normal Variable then its mean is zero and variance is:

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sigma^2

sigma

Probability of occurrence of an event can never be:

Select the correct option.

Positive

Negative

In normal distribution beta1 = 0 and beta2 =

Select the correct option.

The central composite design is composed of:

Select the correct option.

Factorial points

Axial points

Center points

All of these

Var(y_bar_st)opt ___ Var(y_bar_ran):

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If A & B are mutually exclusive events then A intersection B =

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Empty set

In Poisson distribution mean = 4 then its S.D will be:

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M(t) = (1 - beta*t)^(-alpha) is moment generating function of:

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Gamma

Beta type I

Beta Type II

Uniform

Mean Deviation of normal distribution is:

Select the correct option.

0.7979 sigma

0.6745 sigma

sigma

None of these

Minimum number of factors in central composite design should be:

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Binomial probability distribution will be negatively skewed when:

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p > q

p < q

p = q

p != q

Correlation coefficient is ___ of two regression coefficients:

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A.M

G.M

H.M

All of these

Mean does not exist for ___ probability distribution:

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Gamma

Beta

Cauchy

Uniform

If f(x) = 2x, 0 < x < 1 then its F(x) will be:

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x^2

2x^2

x^3

f(x) = (1/theta) * e^(-x/theta), x >= 0 is p.d.f of ___ probability distribution:

Select the correct option.

Exponential/Gamma

Beta

Uniform

Laplace

A statistic is a numerical characteristic calculated from a:

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Population

Sample

Parameter

Census

One of the classical assumptions to apply OLS is Cov(Ui, Uj) =

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Positive

Negative

None of these

Correlation coefficient lies between:

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-1 and +1

0 and 1

-1 and 0

-0.5 and 0.5

If Ui is error term in simple linear regression model and Cov(Ui, Uj) != 0, there is:

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Heteroscedasticity

Multicollinearity

Autocorrelation

None of these

If there exists a linear relationship among regressors (x's) there is:

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Heteroscedasticity

Multicollinearity

Autocorrelation

None of these

If M.D = (beta - alpha)/4 then it is ___ probability distribution:

Select the correct option.

Gamma

Beta type I

Beta Type II

Uniform