Business Statistics

71

Probable error is

A) $$.6745\left( {\frac{{1 - {r^2}}}{{\sqrt N }}} \right)$$ B) $$.6340\sqrt {\frac{{dxdy}}{N}} \times d{x^2}d{y^2}$$ C) $$.6745\sqrt {\frac{N}{{\sum dx}}} $$ D) $$.6340 \times \frac{N}{{\sqrt {\sum dx} }}$$

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Answer & Solution

Answer: Option A

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72

Questioning, experimentation and . . . . . . . . are the examples of primary method.

A) observation B) multiplication C) web surfing D) weighting

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Answer & Solution

Answer: Option A

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73

Standard error (proportion or difference) may be

A) $$\sqrt {\frac{{pq}}{{n - 1}}} $$ B) $$\sqrt {\frac{{pq}}{n}} $$ C) $$\sqrt {\frac{{n - 1}}{{pq}}} $$ D) $$\sqrt {\frac{n}{{pq}}} $$

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Answer: Option B

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74

Match the following.

List-I (Symbols)	List-II (Applications)
a. r	1. Economic order processing
b. $$\overline {\text{X}} $$	2. Mode
c. σ	3. Mean
d. Z	4. Deviation
	5. Correlation

A) a-5, b-3, c-4, d-2 B) a-1, b-2, c-3, d-4 C) a-4, b-3, c-2, d-1 D) a-5, b-2, c-4, d-3

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Answer & Solution

Answer: Option A

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75

In F-test, S₁² and S₂² are defined as

A) $${S_1}^2 = \frac{{\sum {{\left( {{X_1} - {{\overline X }_1}} \right)}^2}}}{{{n_1} - 1}},\,{S_2}^2 = \frac{{\sum {{\left( {{X_2} - {{\overline X }_1}} \right)}^2}}}{{{n_1} - 1}}$$ B) $${S_1}^2 = \frac{{\sum {{\left( {{X_1} - {{\overline X }_1}} \right)}^2}}}{{{n_1} - 1}},\,{S_2}^2 = \frac{{{{\left( {{X_2} - {{\overline X }_2}} \right)}^2}}}{{{n_1} - 1}}$$ C) $${S_1}^2 = \frac{{\sum {{\left( {{{\overline X }_1} - {X_1}} \right)}^2}}}{{{n_1} - 1}},\,{S_2}^2 = \frac{{\sum {{\left( {{{\overline X }_2} - {X_2}} \right)}^2}}}{{{n_2} - 1}}$$ D) None of the above

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Answer & Solution

Answer: Option B

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76

Given

The above diagram represents a . . . . . . . . problem.

A) average mean B) binomial distribution C) median D) regression analysis

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Answer & Solution

Answer: Option B

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77

Which one of the following is restricted non-probability based sampling method?

A) Stratified sampling B) Quota sampling C) Cluster sampling D) Systematic sampling

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Answer & Solution

Answer: Option B

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78

Given, $$\sum $$dx dy = 2350, $$\sum $$d²x = 8250, $$\sum $$d²y = 724, then r will be

A) 0.76 B) 0.36 C) 0.96 D) -0.96

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Answer & Solution

Answer: Option C

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79

Which of the following point is/are correct about MIS?

A) Provide that information which supportsin achieving the MIS goals and objectives B) Budgeted profits of various products C) Transaction processing and data processing D) All of the above

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Answer & Solution

Answer: Option D

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80

Two regression lines closer to each other show

A) lower degree of correlation B) higher degree of correlation C) no correlation D) All of the above

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Answer & Solution

Answer: Option B

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