STATISTICS

Priyabrat Acharya · 38問 · 3年前

通報

問題一覧

Which of the following is not a characteristic of good average

It should be influence by fluctuations in sampling

Which mean is mainly used to find rates

Harmonic

In which of the following means weights are assigned automtically

Harmonic

Harmonic means is always________ than GM

Less

The following formula belongs to

Which of the following is not affected by extreme values

Least square property of arithematic mean states that

The sum of square of deviation from its arithematic mean is MINIMUM

Standard error of which of the following is lesser

The formula belongs to

Combined AM

Which of the following is correct

Mode= 3 Median - 2 Mean

x =∑fm/∑f belongs to

AM, CONTINUOUS SERIES

X = N/ (∑1/x)

Range of dispersion is given by

L-S

Coefficient of Range of dispersion is given by

(L-S / L+S)×100

Which of the following methods cannot be used for open end classification

Range

which of the following is called upper quartile

Which of the following is the method of quartile deviation

Q3-Q1/2

Which of the following is the method of coefficient of quartile deviation

(Q3-Q1/Q3+Q1)×100

Q2 quartile represents

Median

How to find Q1

(n+1)/4

How to find Q3

3× (n+1)/4

value of correlation coefficienties between

-1 to 1

Which of the following gives us Cause and effect relation between X and Y

Regression

In correlation analysis

rxy= ryx

In regression analysis

bxy≠byx

Correlation Analysis

is independent of change in scale and origin

Regression Analysis

is independent of change in origin and not scale

Which of the following is correct

r= √(bxy × byx)

The sign of bxy, byx and rxy is

Same

which of the following is least affected by extreme values

Median

which of the following coincides with the median completely in a symmetrical distribution

Mean

If both events are independent the probability that both events will occur is

P(A) × P(B)

A sampling method in which the entire population is divided into homogeneous sub groups is called

Startified

A sampling method in which the sample is chosen as per accessibility

Convenience

What is P value in hypothesis testing

probability of obtating results to check that null hypothesis is true

What is the critical region in hypothesis testing

The region where null hypothesis is rejected

The process of using a single value to estimate population parameter

Point estimation

What is utility of confidence interval

To provide a range of values within which population parameter lies

Sample mean is a _______ estimate of population mean

point

Z× (σ/√n) is the method of finding

margin of error

Margin error in population estimation refers to

The range of values within which the true population parameter is likely to fall

When the confidence interval is wide

Estimation will be less precise

In time series analysis, what does the ADF test examine?

Unit root presence

Which of the following test is used to test auto correlation

Durbin Watson test

Which of the following test is used for goodness of fit

r square test

Which econometric model is suitable for binary dependent variables?

Probit

Which of the following test is used for functional form misspecification

Ramsey retest test

Which of the following test is used for joint significance of coefficients

Waldt

What does contigeration in econometrics states

Long-run equilibrium relationship between variables

The AIC (Akaike Information Criterion) is commonly used for:

Model selection

The Ramsey RESET test involves assessing the significance of additional powers of

Dependent variable

White test is primarily used to test for:

Heteroscedasticity

Heteroscedasticity means

Large variance in residuals

In symmetrically distributed series

Mean= Median = Mode

In a positively skewed distribution which of the following holds true.

Right tailed distribution, Mean>Median>Mode

In a negatively skewed distribution which of the following holds true.

left tailed distribution, Mean<Median<Mode

In karl pearson's measure of skewness which of the following measure is independent of individual units

Relative

In absolute measurement technique of skewness under karl Pearson the formula is

Mean- Mode

In absolute measurement technique of skewness under karl Pearson(ill defined mode) the formula is

3(Mean- Median)

In relative measurement technique of coefficient of skewness under karl Pearson the formula is

(Mean- Mode)/SD

In relative measurement technique of skewness under karl Pearson(ill defined mode) the formula is

3(Mean-median)/SD

The value of Karl pearson's skewness(Skp) lies between

1 to -1

In case of no skewness the value of Karl pearson's skewness(Skp) is

If there is positive skewness value of Karl pearson's skewness(Skp) lies between

0 to 1

If there is negative skewness value of Karl pearson's skewness(Skp) lies between

0 to -1

The formula of Bowley's absolute (Skb) skewness measurement is

Q3 + Q1- 2Median

The formula of Bowley's Relative coefficient of (Skb) skewness measurement is

(Q3 + Q1- 2Median)/Q3-Q1

In case of positive skewness the gap between median and ______ is higher

In case of negative skewness the gap between median and ______ is higher

In case of Zero skewness the gap between median and ______ is higher

None

"μ" in statistics is called

Population mean

The μ2 moment is the

Variance

The formula of β1 in skewness measurement is

(μ3)²/(μ2)³

If μ3 is +ve then

β1 will be +ve and positively skewed

If μ3 is -ve then

β1 will be -ve and negatively skewed

The formula of γ in skewness measurement is

√β1

If regression line passes through the origin the value of _______ will be zero

Intercept

Identify the "A" labelled curve in the given picture

mesokurtic

Identify the "B" labelled curve in the given picture

Leptokurtic

Identify the "C" labelled curve in the given picture

Platykurtic

which moment is used to measure kurtosis

μ4

What is formula of β2 is measure of kurtosis

μ4/(μ2)²

What is the formula of coefficient of kurtosis γ

γ =β2-3

If the value of β2=3

The distribution will be mesokurtic

If the value of β2>3

The distribution will be Leptokurtic

If the value of β2<3

The distribution will be platykurtic

Which statistic can help identify outliers in a dataset?

Skewness

The type of sampling technique in which a fixed nth term is selected from the population

Systematic random sampling

If both events are mutually exclusive the probability that both events will occur is

P(A) + P(B)

If both events are not mutually exclusive the probability that both events will occur is

P(A) + P(B)- P(A) n P(B)

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