The harmonic mean of 1 and 1 is: MCQ with Answer and Explanation

The harmonic mean of 1 and 1 is:

A. 2

B. 0.5

C. 1

D. Undefined

Answer: Option C

HM = 2 / (1+1) = 1.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

A frequency distribution that uses 'less than' or 'more than' type classes is called:

A. Cumulative frequency distribution

B. Grouped frequency distribution

C. Bivariate frequency distribution

D. Simple frequency distribution

Correct Answer: Option A

Explanation:
Cumulative frequency distributions sum frequencies up to a point or from a point.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

Life expectancy at birth is denoted in a life table by:

A. T_0

B. e°_0

C. l_0

D. q_0

Correct Answer: Option B

Explanation:
e°_x represents complete expectation of life at age x. At birth (age 0), it is e°_0.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

If two events are exhaustive, then:

A. P(A∪B) = 1

B. A and B are independent

C. P(A) = P(B)

D. P(A∩B) = 0

Correct Answer: Option A

Explanation:
Exhaustive events cover the entire sample space.

This question belongs to: Accountancy and Statistics Statistics