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Business Statistics and Research Methods
practice.

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Q241

Open question

Chi-square is to be applied only, when the individual observations of sample are

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Q242

Open question

If sum of the product of deviations of x and y series from their means, i.e., Σxy is zero, the coefficient of correlation shall be

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Q243

Open question

Consider the following statements.
Assertion (A): A reasonably sized sample drawn randomly from large sized population contains almost all the characteristics which exist in the population.
Reason (R): The theory of sampling is based on the two important laws of statistics, viz., Law of statistical regularity and law of inertia of large numbers.

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Q244

Open question

Probable error in statistics is obtained by

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Q245

Open question

When a researcher uses a telephone directory to select the respondents for a opinion poll, he is following . . . . . . . .

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Q246

Open question

Study the following information:
Covariance between X and Y series = -17.8
Standard deviation of X series = 6.6
Standard deviation of Y series = 4.2
Number of pairs of observation = 20
The coefficient of correlation is

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Q247

Open question

Coefficient of quartile deviation is calculated by

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Q248

Open question

Choose the correct answer for the following statements being correct or incorrect.
Statement I If the value of

β_{2}

i.e.

\frac{μ _{4}}{σ _{4}},

of a distribution gives the value more than 3, its curve is platykurtic.
Statement II In a moderately asymmetrical distribution, the standard deviation is 1.25 times of mean deviation.

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Q249

Open question

In a symmetric frequency distribution-

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Q250

Open question

The less than and more than cumulative frequency plot should intersect at the . . . . . . . . of the data.

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Q251

Open question

The correlation coefficientis used to determine:

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Q252

Open question

Weighted averages are considered when

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Q253

Open question

"Statistics is the king of sciences" who said?

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Q254

Open question

Which one relation is not true?

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Q255

Open question

Two common forms of statistical inference are

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Q256

Open question

Match the following.

List-I	List-II
a. $β_{1}$	1. $β_{2} - 3$
b. $β_{2}$	2. $\frac{μ _{3}^{2}}{μ _{2}^{3}}$
c. $γ_{1}$	3. $\frac{μ _{4}}{μ _{2}^{2}}$
d. $γ_{2}$	4. $β_{1}$

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Q257

Open question

If Σx = 12, Σy = 42, Σx² = 46, Σy² = 542, Σxy = 157 and n = 4, find the correlation coefficient.

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Q258

Open question

If two events (both with probability greater than 0) are mutually exclusive, then:

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Q259

Open question

When the regression coefficient is positive the other will be

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Q260

Open question

In a normal distribution the points of inflexion occur at . . . . . . . .

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Business Statistics and Research Methodspractice.

Business Statistics and Research Methods
practice.