Standardized death rate is used to compare mortality across populations differing in: MCQ with Answer and Explanation

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Standardized death rate is used to compare mortality across populations differing in:

A. Age structure

B. Total size

C. Income

D. Sex ratio

Answer: Option A

Solution (By JKSSB Mock Tests)

Age standardization removes the confounding effect of different age compositions.

This question belongs to: Accountancy and Statistics Statistics

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Question #1

Conditional probability P(B|A) is defined as P(A ∩ B) / P(A) provided that:

A. A and B are independent

B. P(A ∪ B) = 1

C. P(B) > 0

D. P(A) > 0

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Correct Answer: Option D

Explanation:
The definition of conditional probability requires P(A) > 0 to avoid division by zero; if P(A)=0, P(B|A) is undefined.

This question belongs to: Accountancy and Statistics Statistics

Question #2

In a binomial distribution with n=5 and p=0.4, the probability of exactly 2 successes is:

A. 0.3456

B. 0.2304

C. 0.5

D. 0.4

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Correct Answer: Option A

Explanation:
C(5,2)(0.4)^2(0.6)^3 = 10 × 0.16 × 0.216 = 0.3456.

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Question #3

In a random experiment, the set of all possible outcomes is known as the:

A. Sample space

B. Event

C. Favorable outcomes

D. Probability density

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Correct Answer: Option A

Explanation:
The sample space comprises every possible outcome of a random experiment.

This question belongs to: Accountancy and Statistics Statistics

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