Business Statistics And Research Methods - Study Mode

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[#161] The numerical value of the standard deviation can never be negative. The positive square root of the mean of the squares of the deviations of observations from their mean is called:

(A) Variance

(B) Range

(C) Standard deviation

(D) Coefficient of variation

Correct Answer

(C) Standard deviation

[#162] Which of the statement(s) are true about 'measures of dispersion'? 1.The divergence of a set of observation 2. The concentration of a set of observation

(A) Only 1

(B) Only 2

(C) Both 1 and 2

(D) None of the above

Correct Answer

(C) Both 1 and 2

[#163] Primary data collected through direct personal interview is suitable for:

(A) Intensive study

(B) Extensive study

(C) Both for intensive and for extensive study

(D) Suitable only when third parties called witness capable of supplying necessary information

Correct Answer

(A) Intensive study

[#164] The first three moments of a distribution about the mean X are 1, 4 and 0. The distribution is:

(A) Symmetrical

(B) Skewed to the left

(C) Skewed to the right

(D) Normal

Correct Answer

(A) Symmetrical

[#165] Mode is a positional average which is used to deal with which type of data? 1. Quantitative data 2. Qualitative data

(A) Only 1

(B) Only 2

(C) Both 1 and 2

(D) None of the above

Correct Answer

(A) Only 1