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Business Statistics and Research Methods
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Q81

If b_xy = 0.25 and b_yx = 0.64 correlation coefficient is

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Q82

Assertion (A): A reasonably large sized sample drawn randomly from a given population contains almost all the characteristics of the population.
Reason (R): As per the sampling theory, the assertion is based only on the 'law of inertia of large numbers'.

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Q83

Which one of the following is not a measure of dispersion?

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Q84

Assertion (A): When there is an evidence of a linear relationship between two variables, it may not always mean an independent-dependent relationship between the two variables.
Reason (R): The casual relationship between the two variables may not imply a reasonable theoretical relationship between the two.

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Q85

If there are 8 possible classes under consideration for a goodness of fit, the number of degrees of freedom will be

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Q86

If the correlation coefficientis a positive value, then the slope of the regression line:

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Q87

In an exclusive class

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Q88

The probable error of the coefficient of correlation(r) is calculated by which one of the following formula?

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Q89

If two events A and B are dependent, the conditional probability of A given B, i.e., P (A/B) is calculated as:

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Q90

Match List-I with List-II and select the correct answer:

List-I	List-II
a. Coefficient of determination	1. $γ_{x y} \frac{σ _{x}}{σ _{y}}$
b. Spearman's rank correlation coefficient	2. $1 - \frac{6 \sum d ^{2}}{n ( n ^{2} - 1 )}$
c. Regression coefficient of $x$ on $y$ variable	3. $\frac{\sum x y}{n σ _{x} σ _{y}}$
d. Karl Pearson's formula of calculating $γ$	4. $γ^{2}$

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Q91

The most appropriate average to be used to compute the average rate of growth in population is

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Q92

The geometric mean of 864 and 512 is-

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Q93

The coefficient of correlation

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Q94

Two events are said to be independent, as per the theory of probability, if the occurrence of one:

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Q95

A distribution where the mode has a lower value than the median and the median is less than the mean is known as:

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Q96

If the population is heterogeneous, which one of the following probability sampling methods is more appropriate?

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Q97

The probability of drawing a 'spade' from a well shuffled packet of cards is

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Q98

Which of the following averages can not be calculated with the help of graphic presentation?

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Q99

National sample survey organisation conducts surveys on

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Q100

Which one of the following is a false statement?

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