The classification of students by blood group is: MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Statistics Questions
Question #1
Report Error
Direct standardization of death rates requires:
Correct Answer: Option A
Explanation:
Direct standardization applies the study population's age-specific death rates to a standard age structure to compute a hypothetical crude rate, enabling comparison free from age composition effects.
Direct standardization applies the study population's age-specific death rates to a standard age structure to compute a hypothetical crude rate, enabling comparison free from age composition effects.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
Report Error
If P(A) = 0.2 and P(B) = 0.3, and A, B are mutually exclusive, P(A∪B) is:
Correct Answer: Option D
Explanation:
For mutually exclusive events, P(A∪B) = P(A) + P(B) = 0.5.
For mutually exclusive events, P(A∪B) = P(A) + P(B) = 0.5.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
Report Error
The weighted arithmetic mean is calculated as:
Correct Answer: Option A
Explanation:
Weighted mean = sum of (value × weight) divided by sum of weights, allowing differential importance of observations, e.g., in index numbers or survey sampling.
Weighted mean = sum of (value × weight) divided by sum of weights, allowing differential importance of observations, e.g., in index numbers or survey sampling.
This question belongs to:
Accountancy and Statistics
Statistics
No comments yet. Be the first to start the discussion!