Business Statistics

81

If $$F \sim F\left( {{\nu _1},\,{\nu _2}} \right)$$ then $$1/F \sim $$

A) $$F\left( {{\nu _2},\,{\nu _1}} \right)$$ B) $$F\left( {{\nu _1},\,{\nu _2}} \right)$$ C) $$F\left( {{\nu _1}/{\nu _2}} \right)$$ D) $$F\left( {{\nu _2}/{\nu _1}} \right)$$

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Answer & Solution

Answer: Option A

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82

Chebyshev's theorem provides that atleast 89% of the values will lie within ±3 standard deviations from the mean for

A) bell shaped distributions B) positively skewed distributions C) negatively skewed distributions D) all of the above

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Answer & Solution

Answer: Option D

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83

Attributes of decision support system are

A) Flexibility B) Database C) Simple models D) None of these

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Answer & Solution

Answer: Option D

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84

Match the items of List-I with those of List-II and choose the correct answer.

List-I	List-II
a. The probability of two events occurring together or in succession	1. Marginal probability
b. The probability of occurring one event given that another event has occurred	2. Posterior probability
c. The probability of occurring a single event	3. Subjective probability
d. The probability revised in the light of additional information	4. Joint probability
	5. Conditional probability

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

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Answer & Solution

Answer: Option D

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85

The value set of α is known as

A) the rejection level B) level of significance C) error D) power test

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Answer & Solution

Answer: Option B

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86

The Management Information System applies on

A) Modelling systems B) Analysis systems C) Query systems D) All of these

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Answer & Solution

Answer: Option D

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87

Which of the following statements are not true with regard to questionnaire?

A) It must comprise of double barreled questions B) It should not comprise of technical jargons C) It should avoid leading questions D) It should avoid unambiguous words

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Answer & Solution

Answer: Option A

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88

Let b_yx and b_xy denote the regression coefficient of y and x on of x on y, respectively. Then, b_yx = b_xy implies that

A) σ_y = σ_x B) $$\rho $$ = 1 C) $$\rho $$ = 0 D) None of these

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Answer & Solution

Answer: Option A

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89

System analysis plays a central role in the development of

A) The management information system B) Planning system C) The computer system D) Design system

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Answer & Solution

Answer: Option A

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90

If p = 0.6 for a particular Bernoulli process, the calculation $$\left( {\frac{{8!}}{{5! \times 3!}}} \right){\left( {0.6} \right)^3}{\left( {0.4} \right)^3}$$ indicates the probability of happening of

A) 5 or more successes in eight trials B) 3 or more successes in eight trials C) exactly 5 successes in eight trials D) exactly 3 successes in eight trials

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Answer & Solution

Answer: Option C

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