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Business Statistics and Research Methods
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Q61

Which of the following statements are true?
1. The coefficient of rank correlation has the same limits as the Karl Pearson's coefficient of correlation.
2. The coefficient of correlation is independent of the change of origin but not of scale.
3. The covariance between

X

and

Y

is defined as

\frac{\sum x y}{n}

where,

x = (X - X), y = (Y - Y)

and

n =

no. of paired observations.
4.

b_{x y}

is called regression coefficient of

X

variable on

Y

variable.
5. If

b_{x y}

is 0.4 and

b_{y x}

is 1.6, coefficient of determination would be 0.8.
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Q62

If the dependent variable increases as the independent variable increases in an estimation equation, the coefficient of correlation will be in the range

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Q63

If the two regression coefficients are 0.8 and 0.2, then the value of coefficient of correlation is

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Q64

Which one of the following objectives is not the objective of secondary data collection?

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Q65

Cricketer 'A' scores on an average 40 runs with a standard deviation of 5. Scores of players 'B' and 'C', on an average, are 75 and 90 with standard deviations 10 and 18 respectively. Arrange the players in the descending order of consistency.

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Q66

Aset of data can be distinguished from other set of data by means of

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Q67

In the frequency curve of symmetric distribution, if a perpendicular is drawn from the vertex to the base line, which is divided into two parts if the area on the right side is greater than the area on the left side, then which of the following has the highest value?

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Q68

Mean

\pm 3 σ

covers-

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Q69

The Fisher index number is

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Q70

Which one of the following statements is false?

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Q71

Select the methods of finding out correlation from the following.
1. Karl Pearson's Method
2. Spearman's Rank Method
3. Yule's Method
4. Coefficient of Contingency
5. Concurrent Deviation Method
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Q72

A distribution, where the value of arithmetic mean is maximum as compared to median and mode, is

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Q73

If A and B are dependent events, then

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Q74

Which of the following is the non-random method of selecting sampling from a population?

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Q75

The Time Reversibility Test satisfies, if

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Q76

Which of the following is not a restricted random sampling technique?

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Q77

If the dispersion is small, the standard deviation is:

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Q78

The process of thoroughly checking the collected data to ensure optimal quality level is referred to as

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Q79

Sample design involves which of the following?
1. Sampling unit
2. Size of samples
3. Type of universe
4. Source list
5. Sampling procedure

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Q80

The value we would predict for the dependent variable when the independent variables are all equal to zero is called:

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