Question # 1

The graph of time series is called:

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Histogram

Historigram

Straight line

Ogive

A sample is usually selected by_______.

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With

Without

Finite

Infinite

Sum of squares of residuals is denoted by

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∑e

∑e²

∑e³

∑e⁴

A specific value of an estimator computed from the sample data is called

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estimation

estimate

interval estimate

point estimate

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biased

unbiased

positively biased

none of these

The trend values in freehand curve method are obtained by:

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Equation of straight line

Second degree parabola

Signal

Graph

The standard error of the estimate increased by decreasing

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population

sample size

errors

precision

The alternative hypothesis always contains the sign of

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equality

inequality

ratio

proportion

1MB equals

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1048576 bytes

1024 bytes

2048 bytes

2380 bytes

For a least squares linear trend=ŷ = a + bx, b is the

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variable

intercept

trend

slope

The normal distribution is represented as_______

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N (μ,σ²)

N (n,p)

N (0,σ²)

None of these

(1-α) is called:

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Critical value

Level of significance

Level of confidence

Interval estimate

The secular trend is measured by the method of semi-averages when:

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Time series contains yearly value

Trend is linear

Time series contains odd number of values

None of them

The difference of the true value of population parameter and corresponding value of sample statistic is called

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non-sampling error

sampling error

random error

none of these

An automobile is driven on the average on more than 1600 kilometers per year, the null hypothesis is

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H_o : μ = 16000 kilometers

H_o : μ ≤ 16000 kilometers

H_o : μ < 16000 kilometers

H_o : μ > 16000 kilometers

Regression line x on y is

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For a least squares linear trend Y = a + bx, the Σ(Y - Y)² = 0 when:

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All the Y-values are positive

All the Y-values lie on the line

All the Y-values lie above the line

None of these

Second moment about mean is also called

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mean

variance

skewness

standard deviation

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